This is a reprint of the first edition of Fundamentals of Marxism-Leninism. This is an in depth work put together by a team of International Party leaders led by Finnish Communist Otto Willie Kuusinen. Originally an 877 page textbook, we have split it up into a 5 Volume set. Volume 1 is consists of the first three chapters focusing on The Philosophical Foundations of the Marxist-Leninist World Outlook.