https://www.youtube.com/watch?v=8W2GaAs5VLo 0:00 Introduction 2:55 Preface to the 1st edition 7:26 Preface to the 4th edition 37:27 Chapter 1. Stages of prehistoric culture 55:52 Chapter 2. The family: 1:17:00 -1 The Consanguine family 1:21:25 -2 The Puna