kenneal - lagger wrote:Regarding the eating of meat or not, it has been postulated that the difference between human development and that of the apes was the greater amount of meat which proto-humans consumed. This extra high grade protein gave our ancestors the additional energy to develop and support a larger brain. Whether or not a vegetarian diet in the long term will lead to a corresponding reduction in brain size we will have to wait and see!!
That's quite a common misconception, Ken: the idea that a single energy source somehow helped humans' brains develop.
You'll be glad to know that the best theory about human brain development isn't a defence of vegetarianism, btw
though when humans
were totally vegetarian, their brains were smaller and, significantly, their guts were bigger and their teeth were quite different (naturally), overall more like other modern herbivores.
No, the single thing that differentiates us from other species is
cooking. Most foods release more (some say up to 50% extra) and require less energy to metabolise when cooked. So meat, veggies, whatever, you can thrive and develop far better once you introduce cooking. Without it, you spend most of your time trying to extract the nutrients and energy and this is more true of meat than other energy sources.
Studies have shown that even pure vegetarians - of several species - thrive better when some or most of their food is cooked. It's not 'better' protein - another myth - but all nutrients more easily metabolised.
Less time and energy spent chewing and metabolising frees up resources for other activities, which then helped humans develop in other ways. Indeed, cooking could have helped to 'civilise' us because most food is simply better - to the nose and the tongue and the teeth - when cooked.
I echo what you say - a varied diet of cooked and raw food is ideal; meat might form part of it (it's purely a choice after all, unnecessary for health and distinctly unhealthy in modern amounts) but in a list of possible foods, it's a tiny percentage.
If meat helps develop big brains, then that explains why maggots and lions have PHDs.
I experience pleasure and pains, and pursue goals in service of them, so I cannot reasonably deny the right of other sentient agents to do the same - Steven Pinker