The Declaration of Independence inherited and carried forward the enlightenment thinkers' thoughts of natural human rights and social contract theory, demonstrated the justice of the War of Independence, greatly inspired the fighting spirit of the soldiers and civilians in the North American colonies, and won the sympathy and support of people from all countries. The Declaration of Independence put forward the bourgeois human rights and the principle of organizing the government: all people are born equal, and the right to life, freedom and the pursuit of happiness are inalienable. In order to protect these rights, the people agreed to establish a government. If any government harms people's rights, people have the right to change or abolish it.