A Three-Layer Analysis (TLA) of Livy, History of Rome, Book 3
1. Question
What did Rome try to learn from foreign law?
This question is not limited to identifying which legal rules Rome brought back from Athens.
Early Republican Rome already had law and social order.
Custom, precedent, religious rules, decisions of the Senate, and the authority of magistrates supported the Roman state and society. However, many of these rules were not written down. Their interpretation depended heavily on patrician legal knowledge and the discretion of magistrates.
For the patricians, custom was a legitimate order inherited from their ancestors.
For the plebeians, however, the same custom could appear to be an unclear system controlled by patrician interpretation.
Rome therefore did not need to learn from foreign law because it had no rules of its own.
Rome needed to learn how to convert existing custom and social order into written law that citizens could know, consult, and use when challenging public authority.
Rome was trying to learn at least five things:
- Which areas of government should be written into law
- How the authority of magistrates should be limited
- How citizens could know and consult the law
- How laws should be drafted, published, revised, and approved
- How foreign law should be adapted to Roman custom, social structure, and the Roman execution environment
This study examines the institutional knowledge Rome sought from foreign law through TLA, or Three Layer Analysis: Fact, Order, and Insight. It also uses OS Organizational Design Theory.
2. Abstract
Rome did not try to learn how to introduce a completed foreign legal system without change.
More fundamentally, Rome tried to learn the institutional technology needed to convert government based on custom, authority, and magisterial discretion into common rules that were public, accessible, and approved by the community.
What Rome tried to learn can be divided into three layers.
The first layer was legal content.
This included rules concerning property, debt, status, family, trials, and punishment.
The second layer was institutional structure.
This included how to limit public authority, how to organize judicial procedure, how to publish law, and how to make civic rights and duties predictable.
The third layer was the process of institutionalization.
This included investigating external institutions, comparing them with Roman custom, drafting Roman rules, publishing the draft, receiving citizen comments, and converting the final text into formal Institutional Control through approval by the assembly.
In Section 31, Rome sent a delegation to investigate Greek law, including the laws of Solon.
In Section 32, the delegation returned with legal materials, and the tribunes demanded that Roman laws be drafted.
In Section 33, the Decemvirate was established to prepare written law.
In Section 34, the draft laws were prepared, displayed to the citizens, revised after public comments, and submitted for approval by the assembly.
This process shows that the investigation of foreign law was not merely the collection of legal texts.
It was a process for converting foreign institutional knowledge into Effective Institutional Control suitable for Rome.
The main conclusion is as follows:
Rome did not seek a completed foreign answer. It sought a method for converting social conflict into public common rules and for designing public authority, judicial procedure, and civic freedom as predictable institutions.
3. Research Method
This study uses TLA, or Three Layer Analysis.
TLA divides historical material into three layers.
The first layer is Fact. It organizes the proposals, political conflicts, investigation of foreign law, establishment of the Decemvirate, publication of the draft, and popular approval recorded in Livy’s text.
The second layer is Order. It extracts the structures behind the facts, including government through custom, unequal access to legal knowledge, magisterial discretion, external institutional learning, legislative procedure, and adaptation to the execution environment.
The third layer is Insight. It derives essential lessons that can also be applied to modern states and organizations.
This study also uses OS Organizational Design Theory R1.31.04.00.
The main concepts used in this study are as follows.
NIC: Non Institutional Control
NIC includes custom, precedent, reputation, and community norms that regulate behavior without being formally written.
NIC can preserve order flexibly through values shared over a long period.
However, it also carries risks. Its standards may be difficult to see, and the authority to interpret those standards may become concentrated in particular persons or social groups.
IC: Institutional Control
IC regulates behavior through written laws, institutions, rules, and penalties.
IC makes visible what is permitted, what is prohibited, and who has which authority.
Effective IC
Effective IC is not merely a written rule.
It is an institution that the execution environment understands, can consult, and can use in practice.
IA: Information Flow Architecture
IA shows where information needed for institutional design comes from and how it reaches decision makers.
External API
An external API is a connection through which one OS exchanges information, institutions, knowledge, or resources with another OS.
Execution Environment Fit
Execution Environment Fit is the degree to which an institution or application matches the culture, ability, social structure, and resources of the OS in which it is used.
4. Layer 1: Fact
In Livy’s Book 3, the investigation of foreign law followed a long political conflict over written law.
In Section 9, the tribune Terentilius proposed that the authority of the consuls should be defined by law.
The monarchy had already ended.
However, from the plebeian point of view, the consuls still possessed authority close to royal power.
The problem was not only that the consuls had strong authority.
The scope and limits of that authority, together with the means of objection, had not been clearly shared as written law.
From Section 10 onward, the proposal was repeatedly submitted. Conflict continued among the Senate, the tribunes, and the plebeians.
In Sections 11 to 13, Livy describes violence, prosecution, and bail in the case of Caeso Quinctius.
In Sections 19 to 21, conflict and compromise continued among the tribunes, the Senate, and the magistrates.
In Section 24, the trial of Volscius became connected with the vote on the proposal. Judicial procedure itself became part of the political conflict between the social orders.
After this long deadlock, Rome sent a delegation to Athens in Section 31 to investigate Greek law, including the laws of Solon.
In Section 32, the delegation returned with legal materials. The tribunes demanded that a Roman legal code be drafted on the basis of the investigation.
In Section 33, the Decemvirate was established to prepare written law.
Members of the delegation to Athens were also selected for the first Decemvirate.
In Section 34, the Decemvirs prepared a draft consisting of ten tables.
The draft was displayed to the citizens.
It was revised after public comments and then submitted for approval by the assembly.
This process shows that foreign law was not transplanted directly into Rome.
It was investigated, drafted, published, revised, and approved before it became Roman law.
5. Layer 2: Order
Rome did not try to learn only the content of foreign law.
Its central structural challenge was to convert order that existed as NIC into IC that the whole community could consult.
The problem was not the absence of law, but the invisibility of law
Rome already had custom and social order.
However, these were mainly operated as NIC.
NIC has several weaknesses:
- the content of rules may be difficult to see
- interpretive authority may become concentrated in one social group
- similar acts may receive different treatment
- citizens may not be able to predict judgments
- the boundary between legitimate discretion and abuse may remain unclear
Rome therefore did not seek to discard all existing custom.
It sought a method for converting the parts of existing order that should govern the whole community into visible IC.
Rome sought to make law public knowledge
When law depends on custom and specialized interpretation, an information gap appears between those who know the law and those who do not.
Patricians could understand and use law as a system of order.
Plebeians could experience law as a restriction revealed only after it was applied to them.
Magistrates held interpretive authority.
Citizens could not always predict the result of a dispute.
The first thing Rome tried to learn from written foreign law was how to fix law in visible form and turn it into common knowledge that citizens could consult.
The publication of the draft in Section 34 shows that the results of foreign investigation were converted from specialized knowledge into public IC.
Rome sought to define the boundaries of public authority
The central issue behind the Terentilian proposal was consular authority.
The purpose of written law was not to make magistrates powerless.
A state needs strong authority to conduct recruitment, military command, administration, and justice.
The problem was that the boundaries of this authority were unclear.
Rome therefore sought to learn how to design limits such as:
- what magistrates were permitted to do
- what they were prohibited from doing
- which procedures they had to follow
- which remedies citizens could use
- who monitored the exercise of authority
The value of written law was not the rejection of strong authority.
Its value was to recognize necessary authority while making its scope and limits public.
Rome sought to convert freedom from personal protection into legal status
In a society governed by custom and personal relationships, civic freedom can depend on status, family, patrons, or connections with powerful people.
Freedom then becomes protection granted by influential persons rather than a common legal status.
Rome appears to have sought a method for moving freedom from personal protection to general legal status.
This required rules concerning:
- the meaning of free status
- property rights
- judicial procedure
- limits on physical detention
- debt
- family relations
These matters had to be moved from personal discretion to general rules.
Rome sought to convert social conflict into common procedure
The conflict between patricians and plebeians appeared in forms such as:
- refusal of recruitment
- obstruction of proposals
- prosecution
- violence
- political bargaining
Under these conditions, each conflict was processed through the balance of power at that moment.
Numbers, threats, military crisis, and political pressure influenced the result.
Rome did not seek a method for eliminating social conflict.
It sought a method for processing conflict inside institutions.
Such a system required:
- rights and duties to be stated in advance
- procedures for disputes
- clear decision makers
- public deliberation
- approval by the community
- results that could be consulted later
Law does not mean the disappearance of conflict.
Law is a structure that directs conflict into common procedures instead of returning it to private violence or social pressure.
Rome sought to learn the lawmaking process
Rome did not seek only completed legal rules.
It also sought a process for creating law.
The development from Sections 31 to 34 can be summarized as follows:
Investigation of Foreign Law
→ Return of Legal Materials
→ Demand for Drafting
→ Establishment of a Specialized Body
→ Preparation of a Draft
→ Public Display
→ Citizen Comments
→ Approval by the Assembly
This process shows that law was not created by the command of one magistrate.
It was created through investigation, design, publication, revision, and approval.
Rome therefore tried to learn not only legal content, but also the legislative process.
6. Layer 3: Insight
Rome did not seek a completed answer from foreign law.
It sought the technology needed to convert order based on custom and discretion into institutions that the whole community could understand, consult, and approve.
Rome sought three layers of knowledge
What Rome tried to learn can be organized into three layers.
First Layer: Legal Texts
This layer concerned the content of specific rules:
- status
- property
- debt
- family
- trials
- public offices
- punishment
- rights and duties among citizens
Second Layer: Institutional Structure
This layer concerned the systems needed to operate those rules:
- the authority of magistrates
- judicial procedure
- publication of law
- confirmation of rights and duties
- enforcement
- citizen approval
Third Layer: Institutionalization Process
This layer concerned the process of converting norms into formal IC:
- investigate external institutions
- compare them with domestic institutions
- select useful elements
- translate them into the domestic social structure
- publish the draft
- receive comments from the execution environment
- obtain formal approval
Specific legal rules may not work unchanged under different social conditions.
However, the process of making law visible, defining authority, establishing procedures, publishing drafts, and obtaining approval can be translated into the Roman environment.
The central object of foreign legal learning was therefore not only individual rules.
It was the architecture that made government through law possible.
Foreign law was a mirror for diagnosing the Roman OS
The value of foreign legal investigation was not limited to learning about another society.
Comparison with an external institution made weaknesses in the Roman system visible.
If another state had public written law, Rome could see the concentration of legal knowledge inside its own society.
If another state defined the authority of magistrates, Rome could see the unclear limits of its own command authority.
If another state had a formal lawmaking process, Rome could see its own dependence on custom.
If citizens in another state could consult the law, Rome could see the low predictability of its own system.
The investigation of foreign law was therefore not simple knowledge import.
It was diagnosis of the Roman OS through external comparison.
The legal delegation was an external API for institutional knowledge
In OS Organizational Design Theory, an external API connects one OS with another.
The delegation to Athens can be understood as an external API application for acquiring institutional knowledge.
The input through this API included:
- written legal rules
- the structure of a legal system
- legislative procedures
- concepts of boundaries on authority
- relations between citizens and magistrates
- methods of publication and approval
However, this input could not operate in Rome without transformation.
Rome had to:
- compare it with Roman custom
- translate it into Roman public offices
- apply it to the conflict between patricians and plebeians
- organize it in a form Roman citizens could understand
- connect it to approval by the assembly
The outputs included:
- written law suitable for Rome
- the Decemvirate as a drafting institution
- published draft laws
- the Ten Tables and later the Twelve Tables
- IC that the community could consult
Rome did not introduce foreign law without adaptation
Athens and Rome had different execution environments.
They differed in:
- social structure
- public offices
- military organization
- family organization
- religion
- citizenship
- landholding
- political participation
Athenian law was therefore not an application that could operate in Rome without change.
When an external institution does not fit the ability, culture, structure, and resources of the receiving OS, it can produce resistance, formal compliance, or failure.
Rome used the following conversion process:
Athenian Law
→ Roman Investigation
→ Comparison with Roman Custom
→ Drafting by the Decemvirs
→ Public Display
→ Citizen Comments
→ Approval by the Assembly
Rome did not simply import foreign law.
It used foreign law as material for reconstructing Roman law.
Foreign legal learning had limits
Learning good legal rules from another society did not automatically guarantee institutional stability.
The Decemvirate was established to connect foreign legal investigation with domestic institutionalization.
However, the second Decemvirate suspended appeal, remained in power after its term, and privatized justice.
This shows that:
- good institutional information
- good legal rules
- good investigation
are not sufficient when the authority of the implementing body is not controlled.
The content of law and the authority structure of the institution implementing that law must be examined separately.
Foreign authority could not replace domestic approval
The fact that a rule came from Solon or Athens could not by itself create legitimacy as Roman law.
Roman citizens needed to know the proposal, comment on it, and approve it as a community.
External knowledge could contribute to legitimacy.
However, legitimacy itself had to be created through domestic publication, deliberation, and approval.
Law was not an isolated component
If Rome extracted only individual foreign rules, it could lose the conditions that made those rules work.
A complete investigation had to ask:
- Which social problem did the rule address?
- Which institutions supported it?
- Who enforced it?
- Was appeal possible?
- Which social norms did it assume?
- Which monitoring and correction circuits existed?
Law is not an isolated component.
It is part of an institutional package connected with magistrates, courts, publication, approval, enforcement, appeal, and monitoring.
Model of Foreign Legal Learning
The effectiveness of foreign legal learning can be expressed as follows:
Effectiveness of Foreign Legal Learning
＝ Quality of External Institutional Knowledge
× Relevance to the Problems of the OS
× Execution Environment Fit
× Domestic Understanding
× Domestic Approval
The learning process can be expressed as follows:
Unclear Domestic Institutions
→ Social Conflict
→ Investigation of Foreign Law
→ Institutional Comparison
→ Recognition of Defects in the OS
→ Translation of Rules Procedures and Authority
→ Public Deliberation
→ Assembly Approval
→ Effective IC
The failure of institutional transplantation can be expressed as follows:
Authority of Foreign Law
× Uncritical Transplantation
× Poor Execution Environment Fit
× Lack of Domestic Approval
× Monopoly of Authority by the Implementing Body
＝ Failure of Institutional Transplantation
The final insight is as follows:
Rome did not seek to imitate foreign legal texts. It sought institutional technology for converting social conflict into common rules. Foreign law served as a comparative model that made the unclear parts of the Roman OS visible and showed methods for publishing law, defining authority, organizing judicial procedure, and obtaining citizen approval. External institutional learning is not completed when a foreign system is imported. It is completed when that knowledge is translated into the domestic execution environment and converted into Effective Institutional Control through domestic approval.
7. Implications for the Modern World
This analysis can be applied when modern organizations introduce overseas systems, practices from other companies, industry standards, or governance codes.
The most dangerous approach is to introduce an external institution only because:
- a famous company uses it
- it is common overseas
- a consultant recommends it
Before adopting an external system, an organization should examine several questions.
What problem does the institution solve?
The organization must identify the real problem behind the institution rather than copying its name or visible form.
Under what conditions does it function?
The organization must examine the culture, human capability, authority structure, monitoring system, and resources supporting the institution.
What must be translated?
The organization must identify differences between the original environment and its own environment.
The system must then be adapted to its own execution environment.
Who will operate the institution?
Even a good system can be privatized when authority becomes concentrated in the operating body and no monitoring exists.
Can the field understand and use it?
A system does not become Effective IC if field members do not know its content or understand how to use it.
Who approves and monitors it?
External experts and senior managers should not complete the system alone.
The opinions, approval, and correction capacity of the execution environment must be included.
Learning from foreign law or another company does not mean becoming the external organization.
It means using the external institution as a mirror, identifying the unclear and missing parts of one’s own system, and rebuilding the institution in a form suitable for one’s own organization.
8. Conclusion
The investigation of foreign law in Livy’s Book 3 was a process through which Rome tried to learn not only legal rules, but also the institutional technology required for government through law.
Rome already had custom, precedent, religious rules, and public authority.
However, these were mainly operated through NIC. Their content and standards of interpretation were not fully visible to the entire community.
The plebeian problem was not simply that the patricians were powerful.
The deeper problem was that citizens could not know in advance:
- how far magistrates could exercise authority
- which standards would be used in trials
- how citizens could seek protection
- how legal decisions could be challenged
Rome therefore investigated foreign law, including Athenian law.
It sought three layers of knowledge.
The first layer was legal content concerning property, status, family, trials, and other areas.
The second layer was institutional structure, including public authority, judicial procedure, publication of law, and citizen approval.
The third layer was institutionalization technology: converting custom into written law, translating external knowledge into Roman conditions, publishing the draft, receiving comments, and transforming it into formal IC through approval.
The third layer was the most universal.
Specific legal rules change according to society and time.
However, the process of:
- making external comparisons
- identifying domestic problems
- translating external knowledge
- publishing drafts
- receiving comments from the execution environment
- obtaining formal approval
- monitoring the implementing body
can also be applied to modern organizations.
From Sections 31 to 34, Rome investigated foreign law, received the returning delegation, established the Decemvirate, published draft laws, received citizen comments, and obtained approval from the assembly.
This sequence shows that foreign law was not introduced directly.
It was translated into Roman society and reconstructed as Roman law through Roman approval.
At the same time, the later despotism of the second Decemvirate showed that good legal knowledge alone could not guarantee institutional health.
Without limits on term, appeal, monitoring, division of authority, and exit conditions, the body creating the law could itself become despotic.
The conclusion of this study is clear:
Learning from foreign law does not mean becoming a foreign legal system. It means using foreign institutions as comparative models, making defects in one’s own OS visible, translating legal texts, institutional structures, and institutionalization processes into the domestic execution environment, and converting them into Effective Institutional Control through community approval.
9. Sources
Titus Livius, History of Rome from its Foundation, Book 3. Japanese translation: Iwaya Satoshi, Roma kenkoku irai no rekishi 2, Kyoto University Press, 2008.
OS Organizational Design Theory R1.31.04.00.