Before its admittance to the union which is the United States, the current state of Arizona was a territory. It included a portion off to the west of the present state line, over the Colorado River in what is now Nevada. Nevada was smaller then to the south and the east. The Arizona Territory gave away that bit of Nevada, which later became Clark County and Las Vegas. If Arizona had kept that bit, how would that have effected the later growth of Nevada. Nevada would still have its silver mines and there was Reno/Tahoe for divorce & gambling, but Las Vegas wouldn't be there in the state. Arizona certainly wouldn't have gambling in its state. How does Nevada develop without the southern bit?