Final answer:
John Locke believed in natural rights and the social contract. These concepts are reflected in the Declaration of Independence.
Step-by-step explanation:
John Locke, an English philosopher, believed in the concept of natural rights, which are fundamental rights that all people have, including life, liberty, and property. He also proposed the idea of a social contract, where people consent to be governed and the government's role is to protect their natural rights. These ideas can be found in the Declaration of Independence, where Thomas Jefferson defined natural rights as 'Life, Liberty, and the Pursuit of Happiness' and stated that governments are created to secure these rights.