John locke develop the idea of a social contract between citizens and the
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philosophers.

   Government

Explanation:  John Locke was an Enlightenment philosopher who developed the idea of ​​a contract between the citizen and the government as a model that contrasted with the model of a monarchy or church that usually supported the monarchy. In the spirit of the Enlightenment, this contract should be the guarantor of equality of all, as equal participant in power by choosing the government and removing it if the government does not work in the interest of the citizens. This is precisely contrary to the mandate of the kings received with the blessing of the church and the source of inequality and disenfranchisement of the majority.

he is known for discovering   the fossil of a female hominin australopithecine   known as "lucy" in the afar triangle region of hadar, ethiopia.

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thurgood marshall

explanation: in 1954, thurgood marshall and a team of naacp attorneys won brown v. board of education of topeka, kansas. in this landmark decision, the supreme court held that segregation in public education violated the equal protection clause of the fourteenth amendment.