The impact of Marx on the 20th century was all-pervasive and worldwide, costing tens of millions of lives where Communism was imposed, resulting in brutal wars to contain or expand it, and vastly improving the lives of workers where fear of Communism resulted in social reform. This program looks at the man, at the roots of his philosophy, at the causes and explanations of his philosophical development, and at its most direct outcome: the failed Soviet Union.