Abstract

The pair-bond model of human origin proposed by Lovejoy in his “Reexamining Human Origins in Light of Ardipithecus ramidus” combines fossil records with the unique sexual behavior of modern humans. This construct, however, seems to lack an emotionally important element. By connecting ovulatory crypsis with frontal copulation and face-to-face contact, the transition to the complexity and subtlety of human emotional life becomes more evident. Reproductive success and emotional representation are considered as two interacting levels in the phylogenetic scale. Thus, the behavioral frame of sociobiology is extended to psychobiological phenomena and a bridge is built between natural sciences and philosophy. Light from both sides will be thrown on the origin of man, including his unique cultural history