My father had retained an emotional affection for the ceremonial of his parental home, without allowing it to influence his intellectual freedom.

My parents had broken through the shackles of dogma.

Furthermore, the study of the present surroundings is insufficient: the history of the people, the influence of the regions through which it has passed on its migrations, and the people with whom it came into contact, must be considered.

This idea was also brought out very clearly by Wallace, who emphasized that apparently reasonable activities of man might very well have developed without an actual application of reasoning.

In other words, we are interested in the anatomical and mental characteristics of men living under the same biological, geographical, and social environment, and as determined by their past.

We do not discuss the anatomical, physiological, and mental characteristics of man considered as an individual; but we are interested in the diversity of these traits in groups of men found in different geographical areas and in different social classes.