What was a fundamental belief of Enlightenment thinkers such as John Locke? Responses that all people have the right to the pursuit of happiness that all people have the right to the pursuit of happiness that the job of government is to protect the natural rights of its citizens that the job of government is to protect the natural rights of its citizens that survival of the fittest will bring the most able to leadership roles in government that survival of the fittest will bring the most able to leadership roles in government that humans are superior to animals