It's Sunday! Time for a little science, okay? Yay! (Okay, maybe, not "yay!" but at least, "this might be interesting!")
So, today, I thought I'd talk about another regularly misunderstood thing about how evolution in general works. Remember, when I say the e-word, all I mean is change over time. That's all evolution is technically.
|Neanderthal & Human|
If that's not how evolution actually works, then how does it? Well, evolution works to adapt us to our environment in the best possible way. Back to brain size: for some reason, it's been in the best interest of modern humans to have slightly smaller brains that Neanderthals, and again for our brain size to be decreasing over the past little while. Those with smaller brains have been having greater reproductive success and out-competing bigger brained people to have their genes become more prevalent in society.
What I'm saying here is that the direction evolution takes isn't directed in any one way or another. It's not always going toward some end goal of the biggest and best (usually perceived of as humans). All it does is make us best suited for our environment through selective processes. Even if that means a smaller brain :)