One of the most compelling reasons for me is that no matter how much some paleolithic hunter-gatherer woman might have pined for mountains of berries or tubers, there were likely few opportunities for her to indulge her cravings, especially if it was the wrong season. With me on the other hand, if a little bit of plant sugar stimulates a craving, I either fight a battle with my own brain to the point of being unable to concentrate on anything else, or, more likely, trot down to the 7-11 and stuff my face with Twinkies.

Eating only meat, I get no cravings, and therefore need no willpower. It's a huge relief.

Also, the longer I eat like this, the better my overall health gets. Nuts and greens may be paleo-approved, but nevertheless, my body does better without them.