Thomas HOBBES (5 April 1588 - 4 December 1679) English philosopher; politician and mathematician. His philosophy leads back to a materialistic vision of reality and to the definition of the human nature generally led to a ferocious individualistic competitiveness. He was tutor of King Charles II Stuart. He wrote many essays; the most famous "The Leviathan". Portrait in a colored engraving by Casper by Wenceslans Hollar; United Kingdom; London circa 1670.