What is man? Almost half a century ago, an acute French thinker, who had emigrated to Argentina due to the vicissitudes of the catastrophe that was the Second World War in Europe, attempted to answer the question posed. The result is this book. Not everyone will agree with its conclusions - on the one hand, because it forces us to revise the paradigms that make up today's "politically correct" thinking, and on the other, because it simply forces us to think and reflect - but anyone truly seeking to understand human nature will find it invaluable. Jacques de Mahieu (1915 - 1990) was a French Argentine anthropologist and political philosopher. He wrote several books on esoterism, which he integrated with anthropological theories dealing with the prehistoric migrations of the Indo-European peoples. De Mahieu traveled to Paraguay and Brazil for anthropological research, finding evidence of what he considered to be viking settlement from the pre-Columbian era.