... I was nosing around some old topics and found this one from 2007 and thought, "This is interesting all over again". 
Start with a cage containing five monkeys. Inside the cage, hang a banana on a string and place a set of stairs under it. Before long, a monkey will go to the stairs and start to climb towards the bananas. As soon as he touches the stairs, spray all the monkeys with cold water.
After a while, another monkey makes an attempt with the same result, again all the monkeys are sprayed with cold water. This continues until pretty soon whenever another monkey tries to climb the stairs all the other monkeys will try to prevent it.
Now put away the cold water. Remove one of the monkeys from the cage and replace it with a new one. The new monkey will see the banana will attempt to climb the stairs. To his surprise and horror all the of the other monkeys attack him. After another attempt, and attack, he knows that if he climbs the stairs he will be assaulted.
Next remove another of the original five monkeys and replace it with new one. The newcomer takes part in the punishment with enthusiasm! Like wise replace third original monkey with a new one, then a fourth and a fifth. Every time a new monkey takes to the stairs it is attacked. The monkeys that are beating him have no idea why they were not permitted to climb the stairs or why they are participating in the beating of the newest monkey.
After replacing all the original monkeys none of the remaining monkeys have ever been sprayed with cold water. Nevertheless no monkey ever again approaches the stairs to try for the bananas. Why not? Because as far as they know that's the way we've always done it around here. We call this TTWWADI
That's The Way We've Always Done It.
