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When did Locke believe that people could overthrow a government?

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Rubbing of Chinese philosopher Confucius in traditional robes with a long beard, based on a design attributed to Wu Tao-hsuan, with Chinese characters above and beside the figure. — political science Stone rubbing (19th century?) of Confucius from a design attributed to Wu Daoxuan (flourished 700–760 CE).

According to John Locke, government is a social contract established by the consent of the governed to protect their fundamental rights, particularly life, liberty, and property, under the law of nature.312

Locke believed that people are entitled to overthrow a government when it abuses its trust and violates these fundamental rights. If a government fails to provide the conditions necessary for citizens to enjoy their rights or acts destructively toward the public good, it loses its legitimacy. In such cases, the people—who are the ultimate judges of whether this trust has been broken—have the right to rebel and replace the existing government with one to which they can willingly give their consent. This right of revolution is considered a permissible, albeit extreme, measure to restore a government that serves the safety and happiness of the people.312