Here you can find readings and authors to explore in various subjects as solicited by subscribers.
Kremlinology
Franz Borkenau
Macrohistory
Marshal Hodgeson, The Venture of Islam: Conscience and History in a World Civilization, Vols 1-3. (U Chicago, 1974)
William McNeil, The Pursuit of Power: Technology, Armed Force, and Society since A.D. 1000 (U Chicago, 1984)
Hans Morgenthau, Politics Among Nations, 6th ed. (McGraw-Hill, 1985)
Charles Tilly, Coercion, Capital, and European States, AD 990–1992 (Basil Blackwell, 1990)
Danny recommends this and more work in historical sociology
Emmanuel Vollerstein, any of his work in systems theory
Marxism
Karl Kautsky
Works on SPD and German social democracy
Daniel Bessner, Democracy in Exile: Hans Speier and the Rise of the Defense Intellectual (Cornell University, 2018) - Chapter 1