Cooking as a force of evolution
Friday, March 5th, 2010Cooking is something we all take for granted but a new theory suggests that if we had not learned to cook food, not only would we still look like chimps but, like them, we would also be compelled to spend most of the day chewing…..
Cooking food breaks down its cells, meaning that our stomachs need to do less work to liberate the nutrients our bodies need. This, says Wheeler, “freed up energy which could then be used to power a larger brain. The increase in brain-size mirrors the reduction in the size of the gut.” Significantly Wheeler and Aiello found that the reduction in the size of our digestive system was exactly the same amount that our brains grew by - 20%. Professor Stephen Secor at the University of Alabama found that not only does cooked food release more energy, but the body uses less energy in digesting it. As a consequence, more time was available for social structure to develop.
- from BBC, Learning to Cook Produced Bigger Brains
Changing food habits is a good example of how we shape our own evolution.
Our evolved biology makes our behavior and culture possible. Our behavior and culture changes, and this allows us to make use of our evolved potential in new ways. Both of these changes our selection pressures. Which in turn changes us biologically as a species. And this changes what is possible for us as individuals and as a culture.
We have evolved so it is possible for us to use tools and cook food. Cooking food allows us to make better use of food nutrients, which in turn allows us to make different and new use of our evolved potential. Both of these changes our circumstances and selection pressures, so different characteristics are selected for. This changes us biologically as a species. And this opens new options for us as a species and a culture.
Nowadays, our own culture is perhaps the most significant source of our own evolutionary change, as it has been for tens or hundreds of thousands of years. Through culture, we change our social and ecological environments, which in turn changes the selection pressures, which in turn changes who we are.



