The Role of Philosophy and Psychology in History by Leonard Peikoff
56:56
Objectivism: A Question and Answer Session by Leonard Peikoff
1:32:42
The Philosophic Basis of Capitalism by Leonard Peikoff
38:16
Philosophy and Psychology | Donald Lambie
1:29:04
"Philosophy and the Real World Out There" by Leonard Peikoff
27:15
O Conceito Mais Mal Compreendido da Física
1:03:43
Como falar
1:01:13
"Marxist Metaphysics and Epistemology" by John Ridpath
1:45:30