How does Trujillo control the people of the Dominican Republic?I don't understand, why would he do that?
Trujillo was assassinated in 1961, so your question should be worded in the past tense.
Trujillo maintained control of the people by gaining control of every possible industry and area of government within the country. He appointed his family to the key political positions and ordered the execution of political rivals. He also maintained strict control over all media, entertainment, and churches and controled the educational system. Trujillo also amassed incredible wealth by controlling industries such as sugar and tourism. By the end of his reign, he controlled approximately 3/5 of the GNP for the Dominican Republic. Like other dictators, Trujillo also had a secret police force charged with maintaining control over the people.
To directly answer your sub-question, why does anyone need COMPLETE authority? In the U.S. and other democracies we elect our leaders and continually subject them to the litmus of those elections. Our leaders are also subject to the checks and balances of our government to prevent them from obtaining this type of absolute power. In a dictatorship, the leader may be elected, but once those elections are complete, that leader is given an abundance of power. Some leaders are unable to bear dissidence within their government or among their people. Sometimes this results in leaders removing those who would oppose them so that they can maintain their power.