Comment Re:Everything good is bad for you (Score 1) 308
The problem with your argument is the "2.5 million years". That somewhat arbitrary timeframe allows you to make the argument that high-fat meat-based diets are ideal. However, if you consider the "diet" of all of our ancestors back to the dawn of life on Earth, roughly 4 billion years ago, you'll find that most of our ancestors over that time were simple organisms that ingested simple sugars - a diet that would kill us today.
At the other extreme, our species has only existed for around 50k-200k years and if we've been eating grains for 10-20k of that, then we've had grains in our diet for around a quarter of the time of our existence.
Either way, its hard to infer what we should eat based off of what our ancestors ate. They weren't us and we're not them.