The early spread of live sport can be linked to a number of factors. Early cultures developed sporting events as a form of popular entertainment that could also double up as competitions or trials. For example, the Roman gladiatorial contests notably mixed sporting events with the chance to redeem crimes, albeit with the final decision often resting with an Emperor. Early forms of athletics in Ancient Greece were also designed to showcase physical prowess, and had an important cultural role in terms of demonstrating civilised ideals. Later adaptation of games ranged from medieval tournaments through to aristocratic sports and other past times. In most cases these were sharply divided by class, with most local sporting events defined as much as by being running brawls than as regimented events. Many contemporary sports like football and rugby developed out of these chaotic origins, adding rules and a stronger sense of decorum to the chasing of balls and tackles.