Many philosophers wrote down their philosophies about the government and . A number of philosophers published books on the subject. They applied the idea of to social and political analysis. Thomas Hobbes wrote Leviathan, a book about social structure and government. He wrote about the , an agreement in which the people exchanged some of their individual freedoms for the government’s protection.

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.