The first four volumes of this eight-volume set provide comprehensive coverage of the factors that determined the evolution of world system in the twentieth century. With over 80 thematically organized articles selection by Michael Cox, Volumes 1-4 examine the 20th century as a period of unprecedented turbulence, marked by unprecedented global confrontations. Together the Volumes combine to provide an unparalleled resource providing broad coverage of the subject with historical depth and contemporary relevance.