Starting in the 1600s, European philosophers began debating the question of who should govern a nation. As the absolute rule of kings weakened, Enlightenment philosophers argued for different forms of democracy.
In 1649, a civil war broke out over who would rule England—Parliament or King Charles I. The war ended with the beheading of the king. Shortly after Charles was executed, an English philosopher, Thomas Hobbes (1588–1679), wrote Leviathan, a defense of the absolute power of kings. The title of the book referred to a leviathan, a mythological, whale-like sea monster that devoured whole ships. Hobbes likened the leviathan to government, a powerful state created to impose order.