The prominent figure associated with the concept of natural rights during the Enlightenment was John Locke. Locke's philosophy emphasized that individuals possess inherent rights to life, liberty, and property, which governments are obligated to protect. His ideas challenged the notion of absolute monarchy and influenced the development of democratic principles. Locke’s writings, particularly in "Two Treatises of Government," informed the American Revolution and the formation of the United States’ foundational documents. His theories laid the groundwork for modern democratic thought, highlighting the importance of individual rights within political systems.