This modern Critical Reader's Edition includes an afterword tracing Marx's intellectual relationships with revolutionary thinkers and philosophers (including Hegel, Feuerbach, Engels, and Ricardo), containing research into his ideological development and economic theories, a complete timeline of his life and works, a glossary of Marxist terminology, and a detailed index of all of Marx's writings. In The Difference between Democritean and Epicurean Natural Philosophy, Marx's dialectical prose is presented in contemporary English with attention to the argument's original force and precision. Together, the translation and supporting apparatus place The Difference between Democritean and Epicurean Natural Philosophy within Marx's intellectual development and its political, religious, economic, and philosophical reception.