““From Marx, I received the concept of what human society is; otherwise, someone who hasn't read about it, or to whom it hasn't been explained, it's as though they were set down in the middle of a forest, at night, without knowing which way north is, or south, east or west. Marx told us what a society is and the history of its evolution. Without Marx, you can't formulate any argument that leads to a reasonable interpretation of historical events - what the tendencies are, the probable evolution of a humanity that has not yet completed its social evolution.””