It's all survival of the fittest.
Animals think that way, and humans are animals. We can be sophisticated and turn savage at any moment. You just gotta be prepared and strong enough to take all the blows and more. Whomever takes the most blows will make history in one way or another. With some people or others. You will never be known if you break under the pressure. You'll just be trampled on underfoot if you don't get up quick enough. So stay strong and prepared. Never back down.