John Locke's ideas were indeed influential on the founding fathers of the United States, particularly during the Enlightenment period. He contributed several important ideas, but two significant ones can be highlighted:
1. Natural Rights: Locke argued that all individuals are born with inherent rights, including life, liberty, and property. These rights are not granted by a governing authority but are instead inherent to every person. In the founding documents of the United States, the idea of natural rights is clearly demonstrated in the Declaration of Independence. Thomas Jefferson, one of the primary contributors to the document, drew inspiration from Locke's ideas when he wrote, "We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness."
2. Social Contract: Locke proposed the idea of a social contract between the government and its people. According to this concept, individuals willingly give up some of their natural rights in exchange for the government's protection of their remaining rights. In the founding documents of the United States, the social contract idea is present in the Constitution. The preamble states, "We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity..." This indicates the consent of the people to be governed and their expectation of certain rights and benefits in return.
In summary, John Locke contributed the ideas of natural rights and the social contract to the Enlightenment, and these ideas are clearly demonstrated in the founding documents of the United States.