Most people remember Gandhi and Dr. Martin Luther King, Jr. as reformers who practiced non-violent forms of protest and advocacy. Both effectively changed the popular opinion about emotional issues for their countries and brought in a wave of change that was long overdue. But the practice of non-violent protest, or civil disobedience, started long before either Gandhi or King. It began with a quiet, shy poet who is best known for writing a lot about a pond.

What is the main idea of the bolded paragraph?

King and Gandhi both practiced non-violence.
Many people have heard of King and Gandhi.
King and Gandhi are known for protesting
Most people protest from time to time.