What ideas did John Locke develop in Essays on the Law of Nature?

In his early work Essays on the Law of Nature (1664), John Locke established foundational philosophical positions that he maintained throughout his life. The text centers on two primary arguments:

• The Law of Nature: Locke posits the existence of a natural moral law that serves as the foundation for determining the rightness or wrongness of all human conduct. He argues that because humans are created with specific faculties and reason, they are destined for a particular mode of life, which inherently results in definite duties.12
• Empiricism: He asserts that all knowledge, including moral knowledge, is derived from experience rather than being innate.1

Locke believed that this moral order is rooted in "the soil of human nature" and can be discovered by human reason just as one might discern the properties of a triangle. By applying these faculties, all human beings can grasp these basic moral truths. These concepts were essential to his later work, providing the framework for his epistemology and his theories on the state of nature and political legitimacy.213