Thomas Hobbes 15884.5~1679.12.4) Encarta Encyclopedia, Archivo conografico, S.A. /Corbis English political philosopher and is best known for his treatise Leviathan Written during the mid-17th century amidst the tumult of the English evolution, Leviathan outlines Hobbes s theory of sovereignty(political authority)English political philosopher and is best known for his treatise Leviathan. Written during the mid-17th century amidst the tumult of the English evolution, Leviathan outlines Hobbes’s theory of sovereignty (political authority). Thomas Hobbes 1588.4.5~1679.12.4）