a. In this quote, Locke highlights a very important concept that originated during the Enlightenment period. This is the idea of the equality of men. Locke argues that all men and equal, and that all men are free. Therefore, governments need the consent of men before acting. This is illustrated in a Republican government by the fact that citizens are able to vote in elections to chose their representatives, and thus have laws that they have consented to.
b. An example of equality in the Constitution would be the 13th Amendment. This was passed on January 31, 1865, and it made slavery unconstitutional. This amendment contributed to the achievement of equality between white and black people.
c. The First Amendment is a section of the Bill of Rights that illustrates Locke's ideas of equality and freedom. In this amendment, it is established that the government cannot regulate the practice of religion. This means that people are free to practice different religions, and that the government will not treat people differently based on the religion they practice.