7-11 has been a recognized natural phenomenon since the dawn of recorded history.
It is believed that the 7-11 was a natural evolution of the 7-10, a prehistoric herd animal. 7-10 were common when the entire landmass of Earth was concentrated into one supercontinent, Pangaea. Herds of 7-10 freely roamed the continent, having only one natural predator - the Chuck Norris. The massive evolutionary strain induced by such a formidable foe necessitated a new evolutionary strategy.
The first 7-11 was created by a confluence of the superintelligent East Indians and a herd of 7-10. This new symbiotic strategy proved successful - so successful, in fact, that individual members could survive without the protection of the herd. 7-11 spread to every corner of the supercontinent before the famed breakup of Pangaea (actually caused by one of Chuck Norris' temper tantrums) and so were located around the planet when humans showed up some hundreds of millions of years later.
The influence of the 7-11 on humanity has been tremendous. Former hunter/gatherer societies, upon finding a cluster of 7-11, would settle there rather than continuing their nomadic lifestyle. With the relief of the burden of constantly searching for food, humans were free to develop other primitive activities, such as religion and the killing of innocent people. It is at this point in history that we see the first evidence of Norris worship, including human sacrifice and execution by roundhouse kicking. The first cities developed around herds of 7-11, and wars were common between those who had access to 7-11 and those who did not have such privilege.