On Imperialism and World Economy - world economy defined https://marxistleninists.org/Reading%20Guide/On%20imperialism%20and%20world%20Economy/world%20economy%20defined.htm
Lenin: The Assessment of the Present Situation https://www.marxists.org/archive/lenin/works/1908/nov/01.htm
The Class Struggles in France, 1848 to 1850 http://hiaw.org/defcon6/works/1850/class-struggles-france/index.html