Why would some rulers build elaborate palaces such as El Escorial and Versailles?

They built those kind of palaces because they wanted to showcase their power and prestige. Es Escorial in particular was built by Philiph II, one of the most important kings in Spanish history, who presided over the rule of the Spanish Empire when it was in expansion.

These kind of palaces could also instill fear on political opponents, and this is another reason why practically every European powerful monarch built a palace like El Escorial in their respective countries.

disorders of the brain include both behavior disorders and other psychiatric illnesses. the primary difference between a behavior disorder and another type of psychiatric disorder is the presence of choice. psychiatric conditions are considered to be involuntary while in behavior disorders, choices are essential.