The correct answer to this open question is the following.
We are going to choose the two Enlightenment thinkers' topic.
First, John Locke.
This brilliant English thinker from the Enlightenment proposed the idea of the Social Contract. This concept is so influential in today's politics. Social Contract means society accepts a "contract" established by citizens and the government. Through this contract, citizens give some of their liberty so the government can create the rules and regulations to have the proper control of society, by ruling it and protect it. In modern democracies people vote and elect their President and representatives, so they can deliver results and govern with honesty, protect the citizens, and create the economic conditions to grow and prosper.
The other thinker is Voltaire.
Voltaire was one of the most important thinkers of this period in the history of humanity. He favored the use of reason instead of emotions and critiqued some religions like Judaism, Islam, and catholicism. However, he always supported the idea to respect and be tolerant of religious beliefs.
During the Enlightenment period, other great thinkers changed the way people thought. These were Baron of Montesquiou, Tomas Hobbes, and Jean-Jaques Rosseau.