Final answer:
The Enlightenment period from 1650-1800 emphasized reason, science, and questioning of traditional beliefs and institutions. Denis Diderot and Jean le Rond d'Alembert were influential Enlightenment thinkers who contributed to the development of the Encyclopédie.
Step-by-step explanation:
The Enlightenment period from 1650-1800 was a philosophical movement that emphasized reason, science, and questioning of traditional beliefs and institutions. This movement sought to shed light on the world and apply scientific principles to human society. Denis Diderot and Jean le Rond d'Alembert were influential Enlightenment thinkers who played important roles in the development of the Encyclopédie, a comprehensive collection of knowledge and ideas.