Firstly, there was a lack of employment that angered a lot of people that caused them to want to revolt. Getting a job was becoming harder and salaries weren't very good. Secondly, Batista was a very unpopular president so Fidel Castro and Guevara gathered people to fight against him. Batista was unfair and ruled by force and did not listen to the people. Finally, Fidel Castro thought that Batista was a dishonest man and since he wasn't allowed to change laws he started a revolution. Fidel Castro saw how aweful of a leader Batista was and managed to do something about it.