Was Mexico a violent revolution or a peaceful transfer of power? Why was there a change?

Morning how ur day and quick question who started the civil war?

Why is julius caesar considered an important roman leader? a. his assassination led to a civil war that ended the roman republic.b. his commitment to justice led to the creation of the twelve tablesc. his support for democracy led to expand voting rights for all romansd. his policies as dictator led to a period of peace known as the pax romana

1.     in what kind of government does a small group have a firm control over a country?