Causal beliefs lead to toolmaking, which require handedness for motor control
|Lewis Wolpert a1|
a1 Anatomy Department, University College London, London WC1E 6BT, United Kingdom
Toolmaking requires motor skills that in turn require handedness, so that there is no competition between the two sides of the brain. Thus, handedness is not necessarily linked to vocalization but to the origin of causal beliefs required for making complex tools. Language may have evolved from these processes.