Final answer:
John Locke believed that if a government fails to protect its citizens' natural rights, the citizens have the right to overthrow that government.
Step-by-step explanation:
English philosopher John Locke (1632-1704) believed that if a government failed to protect its citizens' natural rights, the citizens had the right to overthrow that government. In his influential work, Two Treatises of Government, Locke argued that all individuals are born free and equal and have natural rights such as life, liberty, and property. He also emphasized the importance of the social contract, where individuals willingly give up certain rights in exchange for protection and justice from the government.