
Rafael Rojina Villegas, a renowned Mexican jurist, defined Derecho Civil as follows: "Conjunto de normas jurídicas que regulan las relaciones de los particulares entre sí, en lo concerniente a su persona, a su familia, a sus bienes y a sus obligaciones." Let's break down this definition to understand what it means.
Regulación de Relaciones Entre Particulares
The Derecho Civil governs how individuals interact with each other. This means it doesn't typically deal with the government or public institutions directly, but focuses on relationships between people like you and me. For example, imagine you're buying a used car from your neighbor. The rules that govern that sale fall under Derecho Civil.
Lo Concerniente a Su Persona
This part refers to the legal aspects of being a person. It includes things like your name, your domicile (where you legally live), and your legal capacity (your ability to enter into contracts and be responsible for your actions). Think about getting married. The legal requirements to be considered a married couple, your rights and responsibilities as a spouse, are all areas covered within this realm.
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Lo Concerniente a Su Familia
Derecho Civil also covers family matters. This includes marriage, divorce, adoption, parental rights, and inheritance. For instance, if your parents pass away, the rules regarding how their property is divided among their children are part of this area. Child custody arrangements following a divorce are another clear example.
Lo Concerniente a Sus Bienes
This concerns your possessions and property. It governs how you can own, use, and transfer things like your house, car, bank account, or even intellectual property like a song you wrote. For example, if you want to rent out your apartment, the rules and regulations that define the landlord-tenant relationship are governed by Derecho Civil.

Lo Concerniente a Sus Obligaciones
Finally, Derecho Civil deals with your obligations or debts. It explains how contracts are formed, what happens if you break a contract, and how you can be held liable for damages you cause to someone else. Imagine you agree to paint your friend's house for a certain amount of money. The agreement is a contract, and the rules about whether you fulfill your end of the bargain fall under this category.
In summary, Rafael Rojina Villegas' definition highlights that Derecho Civil is the bedrock of private law, shaping nearly every aspect of our personal and economic lives. From the smallest purchase to the most significant family event, the rules and principles of Derecho Civil provide the framework for a just and ordered society.