Based on the group sizes early humans probably lived in, they would have had to spend 30–45 percent of their day grooming to maintain social cohesion—probably an unsustainable amount of time. Gradually, mimetic forms of communication—gestures, grunts, and other vocalizations—would have become more significant, offering a more efficient form of social interaction than grooming, until finally developing into language.
Grooming. Mimetic form. Then Language
