Final answer:
The common theme among Enlightenment thinkers was a desire to improve society.
Step-by-step explanation:
The common theme among Enlightenment thinkers was a desire to improve society. Enlightenment thinkers believed in the power of reason and science to bring about progress and advancement in society. They advocated for the use of reason and observation to understand the world and make improvements in various aspects of society, such as government, education, and social institutions.