
Natural law is a philosophical and legal theory that asserts the existence of inherent laws derived from nature and universal moral principles. It suggests that certain rights, values, and responsibilities are innate to human nature, independent of societal norms and legal systems. The concept of natural law has evolved through contributions from various thinkers, including Aristotle, Cicero, Aquinas, and more recently, Mahatma Gandhi and Martin Luther King Jr. While natural law has been debated and interpreted differently, it remains a fundamental principle shaping societal behaviour and reasoning.
| Characteristics | Values |
|---|---|
| Natural law is a philosophical and legal theory | Natural law is a system of right or justice |
| Natural law is derived from nature and universal moral principles | Natural law is innate or divinely determined |
| Natural law is independent of enacted laws or societal norms | Natural law is common to all humans |
| Natural law is based on morality | Natural law is derived from the nature of human beings and the nature of the world |
| Natural law is objective | Natural law is based on practical rationality |
| Natural law is based on reason | Natural law is based on the idea that human beings have certain rights, values, and responsibilities |
| Natural law is based on divine providence | Natural law is based on the idea that certain rights and moral values are inherent in human nature |
| Natural law is based on the idea of a social contract | Natural law is based on the idea of a universal moral code |
| Natural law is based on the idea of natural rights | Natural law is based on the idea that rights are guaranteed and not granted by a constitution or government |
| Natural law is based on the idea of equality | Natural law is based on the idea that all human lives are sacred and of equal value |
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What You'll Learn

The philosophy of natural law
Natural law is a philosophical theory that asserts the existence of a set of inherent laws derived from nature and universal moral principles. These laws are discoverable through reason and are thought to exist independently of enacted laws or societal norms. The theory holds that certain rights, values, and responsibilities are inherent in human nature, and that these natural laws serve as the foundation for human-made laws. This view contrasts with legal positivism, which posits that laws are created by human authorities and are not inherently tied to moral principles.
The concept of natural law has a long history, with central ideas present in Christian thought since the Roman Empire. However, it was Thomas Aquinas who laid the foundation for a consistent system of natural law. Aquinas argued that because humans possess reason, and reason is a spark of the divine, all human lives are sacred and of infinite value. This intrinsic worth gives rise to an intrinsic set of basic rights that cannot be taken away. Aquinas' view of natural law, therefore, revolves around the rational nature of human beings as the defining factor of moral law.
In the Renaissance and Age of Enlightenment, natural law theory evolved further, combining with other philosophical theories like social contract theory. This modern iteration of natural law played a significant role in challenging the theory of the divine right of kings and justifying the establishment of a social contract, positive law, and government.
Natural law theory has found support from prominent thinkers throughout history, including Mahatma Gandhi and Martin Luther King Jr. Gandhi, for instance, warned of the dangers of what he called the “seven social sins,” which included wealth without work, politics without principle, and commerce without morality. These ideas demonstrate the continued relevance of natural law theory in shaping societal norms and values.
While natural law theory has its supporters, there have been disagreements and debates about its meaning and relation to positive law. Some scholars, like John Courtney Murray, have even proclaimed the “death” of natural law, highlighting the ongoing evolution of philosophical thought. Nonetheless, natural law continues to play a central role in ethical and legal discussions, with lawyers and scholars placing it at the forefront of contemporary debates.
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Natural law and legal theory
Natural law is a philosophical and legal theory that asserts the existence of a set of inherent laws derived from nature and universal moral principles. It is a system of justice held to be common to all humans, derived from nature rather than societal rules or positive law. Natural law theory holds that certain rights, values, and responsibilities are inherent in human nature, and these constitute the basic principles of practical rationality.
The central ideas of natural law have been part of Christian thought since the Roman Empire, but its foundation as a consistent system is attributed to Aquinas, who synthesised and condensed his predecessors' ideas into his Lex Naturalis ('natural law' in Latin). Aquinas argued that because human beings have reason, and because reason is a spark of the divine, all human lives are sacred and of infinite value compared to any other created object. Thus, everyone is fundamentally equal and endowed with an intrinsic set of rights that cannot be revoked. Aquinas's theory focuses on the overlap between natural law moral and legal theories, and he derived moral law from the nature of human beings.
The Stoics conceived of an entirely egalitarian law of nature in conformity with the logos inherent in the human mind. This notion was reflected in the writings of St. Paul, who described a law "written in the hearts" of the Gentiles. St. Augustine of Hippo embraced this idea and developed the concept of man having lived freely under natural law before his fall into sin and subsequent bondage under positive law. Aristotle also recognised the distinction between what is "just by nature" and what is "just by law", arguing that there is a natural justice that is valid everywhere, independent of people's thoughts or societal norms.
Natural law theory took a more modern shape in the Age of Enlightenment, combining inspiration from Roman law, Christian scholastic philosophy, and contemporary concepts such as social contract theory. It was used to challenge the theory of the divine right of kings and became an alternative justification for the establishment of a social contract, positive law, and government, leading to the formation of classical republicanism.
In Catholic countries during the twelfth century, Gratian equated natural law with divine law. A century later, Albertus Magnus addressed the subject, and his pupil, Thomas Aquinas, restored natural law to its independent state, asserting it as the rational creature's participation in eternal law. However, Aquinas acknowledged that human reason could not fully comprehend eternal law, so it needed to be supplemented by revealed divine law.
Natural law continues to be a subject of debate, with lawyers and scholars placing it at the forefront of discussions in the political system.
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Natural law in ethics
Natural law is a philosophical and legal theory that asserts the existence of a set of inherent laws derived from nature and universal moral principles. In ethics, natural law theory posits that specific rights, values, and responsibilities are inherent in human nature and can be understood universally, independent of enacted laws or societal norms. This theory holds that human behaviour is governed by moral standards objectively derived from human nature and the world, rather than from societal rules or positive law.
The concept of natural law has evolved over time, with contributions from ancient philosophers like Aristotle and Cicero, to more modern thinkers like Mahatma Gandhi and Martin Luther King Jr. Aristotle, for instance, distinguished between what is "just by nature" and what is "just by law," acknowledging a natural justice that exists independently of human thinking. Cicero, on the other hand, emphasised the role of natural law in contributing to the general good of society, as opposed to positive law, which contributes to societal safety.
One of the most influential figures in the development of natural law theory is Thomas Aquinas, who synthesised the ideas of his predecessors. Aquinas' natural law theory revolves around the idea that human beings possess reason, which is a spark of the divine. This intrinsic reasonableness, according to Aquinas, bestows upon all human lives infinite value and equality, along with a basic set of rights that cannot be revoked. Aquinas' perspective highlights the intersection of natural law moral and legal theories, with natural law constituting the principles of practical rationality by which human actions are judged.
In the context of ethics, natural law has significant implications for understanding rights and moral values. It suggests that certain rights are inherent and universal, existing independently of any legal system or societal norms. For instance, the understanding that killing another human being is wrong is universally accepted, and this belief is inherent in human beings, regardless of legislation. Similarly, the concept that two people who create a child naturally become the parents and caregivers is another example of natural law, as it is a belief that exists without the need for human-made laws.
Natural law theory also extends beyond individual rights to societal and governmental structures. For instance, during the founding of the American nation, the idea of natural rights served to justify and shape how the government exercised its authority. Natural law provided a foundation for understanding fundamental rights as limits on governmental power, both in terms of protecting those rights from violations by private actors and regulating them for the promotion of the common good.
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Natural law and religion
Natural law is a philosophical and legal theory that asserts the existence of a set of inherent laws derived from nature and universal moral principles. These laws are discoverable through reason and are thought to exist independently of enacted laws or societal norms. The theory holds that certain rights, values, and responsibilities are inherent in human nature.
The concept of natural law has a long history and can be traced back to ancient Greek philosophy, including the work of Aristotle. The idea was further developed by Roman jurists and philosophers, such as Cicero and St. Paul, and later by Christian scholars during the Middle Ages, including Albert the Great and Thomas Aquinas. Aquinas is particularly notable for synthesizing and condensing these ideas into his Lex Naturalis ('natural law'). He argued that because human beings possess reason, and because reason is a spark of the divine, all human lives are sacred and of infinite value. This led to the belief that everyone is fundamentally equal and endowed with intrinsic basic rights that cannot be taken away.
The relationship between natural law and religion is complex and has been the subject of much debate. In Catholic countries during the 12th century, Gratian equated natural law with divine law, suggesting that natural law is derived from God. Aquinas also acknowledged the divine, stating that human reason could not fully comprehend eternal law and needed to be supplemented by revealed divine law.
However, the concept of natural law has also been used to argue for the separation of church and state. For example, James Madison believed that an individual's relationship with God existed prior to their entry into society and that the state had no authority to interfere in this relationship. The right to the free exercise of religion, according to Madison, is ensured by maintaining this separation.
In Islamic law, the concept of Istislah bears similarities to the Western tradition of natural law. Scholars such as Abu Mansur al-Maturidi and Averroes (Ibn Rushd) argued that the human mind could discern between good and evil without the need for revelation. Al-Maturidi gave examples of stealing, killing, fornication, and drunkenness as evils that the human mind could recognize through reason alone.
The idea of natural law has been invoked by influential figures such as Mahatma Gandhi and Martin Luther King Jr. in their pursuit of social justice. For instance, Gandhi warned against what he called the seven social sins, which included wealth without work, politics without principle, and commerce without morality.
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Natural law in the US
Natural law is a philosophical theory that asserts that certain rights, values, and responsibilities are inherent in human nature. It is the idea that there is a set of universal moral principles that are not dependent on the rules of society or positive law. Natural law is derived from nature and can be discovered through reason.
In the United States, natural law has played a crucial role in shaping the country's legal system and Constitution. The founding fathers, including Thomas Jefferson, Benjamin Franklin, James Madison, Alexander Hamilton, and John Jay, were influenced by the ideas of natural law when drafting the Declaration of Independence and the Constitution. These documents express the belief in natural rights and justice that are applicable to all people, regardless of political exceptions.
One key example of natural law in the US context is the universally accepted understanding that killing another human being is wrong. This belief is inherent in human beings and does not require legislation to be understood as morally wrong. Similarly, the idea that two people who create a child naturally become the parents and caregivers of that child is another example of natural law.
The concept of natural law has also been used in international criminal law prosecutions led by the US, such as those at Nuremberg after World War II. Additionally, natural law has been invoked in discussions of equal protection and voting rights, where it can serve as a limit to narrowly-technical manipulations of Constitutional law codifications.
The influence of natural law in the US can also be seen in the work of jurist A.P. d'Entreves, who emphasised the binding and overriding nature of natural law over all other laws. Furthermore, during the American Revolution, Cicero's ideas on natural law continued to influence legal thinking. Cicero argued that justice and law originate from what nature has given to humanity and that natural law contributes to the general good of society.
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Frequently asked questions
Natural law is a philosophical and legal theory that posits the existence of a set of inherent laws derived from nature and universal moral principles.
Natural law theory holds that certain rights, values, and responsibilities are inherent in human nature and can be understood universally, independent of enacted laws or societal norms.
One example of natural law is the universally accepted understanding that killing another human being is wrong. Another example is the idea that the two people who create a child become the natural caregivers for that child.
The central ideas of natural law have been part of Christian thought since the Roman Empire. However, its foundation as a consistent system is attributed to Aquinas, who synthesised and condensed his predecessors' ideas into his Lex Naturalis ('natural law').











































