But not in that quantity as we do today. In the past it was very special, because you allways had to kill one of your animals to eat some. And if you were a farmer who can decide to eat one big meal or ceep the animal and have milk for a long time its a preety easy decision.
And if you go back even more when humans were still “wild” meat was even harder to get. You had to hunt down an animal that was way stronger that you. So a hunt took days. If you got meat once every few weeks you were lucky.
Sure, nobody ate anything in the quantities that we eat today, but that doesn’t mean it wasn’t a crucial part of our diet. It’s amazing that modern industrialized humans are able to get enough calories and protein from a diet of varied plants, but if you’re a hunter gatherer you don’t have the luxury of a variety of genetically modified protein rich plants, you need meat if you’re going to grow. That’s the niche we evolved to fill, it’s why we have a highly acidic gut, a medium length digestive tract common in omnivores, and teeth designed to tear meat. It doesn’t take a lot of meat to meet a person’s protein requirements, the occasional successful hunt is enough, but without any they would die.
I am vegetarian for over 5 years. You realy don’t need any meat. That just some public believe the meat companies planted in our heads. For a vegetarian lifestyle your don’t even have to pay attention to a lot of stuff. In general it’s way more healthy if you do it right. The only thing is that it’s usually harder to cook something tasty, because you can just throw meat in anything and it tastes like something.