"One please," I said to the lady behind the ticket desk. I paid her for the ticket to the Central Park Zoo before she handed me my ticket. I made my way over to the monkey exhibit, taking a seat next to the window and watching the two monkeys inside interact with each other and their environment. It was so simple for them. They get fed. They have toys. They have each other. There wasn't much more to life for them. What do they do when they get into a fight? Throw food? Slap each other a little? Scream maybe? But they have to make up. Because it's only the two of them in this entire habitat. And they seem to play together now. So, they can't stay mad at each other forever. But what if you add more monkeys to the mix? What if there were three of them, and then two of the

