Why did the Spanish create Viceroyalties in the Americas?

In the eighteenth century, a burgeoning population, among other factors, led the Spanish to split the viceroyalty of Peru apart so that it could be governed more effectively. This move resulted in two new viceroyalties: New Granada and Río de la Plata.

frederick william of brandenburg-prussia trained his son, frederick, to be a hardy soldier. but frederick disliked rifle shooting and horseback riding. unlike his father, he was interested in french literature. he enjoyed poetry and music and, like some others of the enlightenment, he scoffed at religion. his father thought him soft, frivolous and unmindful of his duties. and when frederick refused to put his signature on a right to succession, for a few moments his father strangled him.

idk