Why Do We Clap And Where Did The Action Originate From? [VIDEO]

Why do we clap for concerts, church, public speakers, etc.? The question had never actually popped up in my head before. That is until I ran across this video randomly last night. It's always nice to learn something new and I found it very informative. Now I can honestly say, I'm part of the hive mindset. Watch and see if you agree.