So.. this is some kind of thread where you have to explain the good things about a class?
Very well, HUMANS! Now that's a class, they can eat, drink, sleep, sit, and do more various actions, they come in a variety of colours: black, white, yellow, orange, etc.
They have more spirit that can be crushed in a nuclear war. They can see stealthed taurens, they show diplomacy in court!

Yes sir, no way to defeat a human. (unless you put a bullet through their head)