Locke "Natural Rights!"
Locke believed that human nature is governed by natural laws. In order to obey natural laws, al humans must exercise natural rights: the rights to life, liberty, and property. Locke argued that the function of government was to protect these rights. If a government did not protect, the citizens had the natural right to change it for one that would.
Another words, the citizens could over throw a government that was not doing its job.