Boxing (or fighting) is probably as old as time along with prostitution and taxes.
The first record (or physical depiction) of boxing comes from around 3000BC in Mesopotamia (modern day Iraq). Since then there have been other notable ancient depictions of boxing and in 1650BC we have the first depiction of Boxing in front of spectators, dating back to Thebes in ancient Egypt.
The first illustration of boxers with gloves was seen on a fresco from the Minoan civilization dating back to the Bronze Age in Crete c1650BC.
The modern day sport of boxing as we would recognise it has some seriously dodgy roots and was pretty much outlawed within what we would know as *civilized society* through most of the 19th Century. In America, boxing's roots are directly traceable to the illicit world of gambling and casinos.