Check out our new Explaining History video channel on YouTube, featuring advice, study skills, theory and further exploration of 20th Century themes. Click here for more Welcome to Explaining History:20th Century history ebooks for Kindle and iBooks, Kobo and more From the very origins of the communism, in the radicalised European working class movements of the late 19th Century, a vast an complex ideological movement that would eventually dominate much of humanity a century later emerged.