Karen Armstrong
Carlos Fraenkel
Tan Malaka
Roland Boer
Leon Trotsky
René Descartes
Ahmad Sahidah
Haidar Bagir
Claude Guillot
Bhaskar Sunkara
Said Ramadhan Al-Buthy
Samir Amin
Henri Arvon
Allama Iqbal
Husein Muhammad
Eric Weiner
Haidar Bagir, Ulil Abshar Abdalla
Angela Davis
Alan Woods, Ted Grant
Erich Fromm
Albert Camus
Friedrich Nietzsche
Eko Prasetyo, Saiful Arif
Jean-Paul Sartre
Eko Prasetyo
Antonio Gramsci
Thomas Piketty
Fahruddin Faiz