- Trotsky, Leon4
- Aleksinskii, Grigorii Ivanovich1
- Andrieu, René1
- Avakian, Bob1
- Bennigsen, Alexandre1
- Berdiaev, Nikolai1
- Castro, Fidel1
- Dahrendorf, Ralf1
- Daniels, Robert V.1
- Dutt, R. Palme1
- Hammond, Thomas Taylor1
- James, C. L. R.1
- Kautsky, Karl1
- Leonhard, Wolfgang1
- Luxemburg, Rosa1
- Mason, David Stuart1
- Priestland, David1
- Reswick, William1
- Rousset, David1
- Seton-Watson, Hugh1