Michael Goldfarb traces the history of the march through the footsteps of Martin Luther King, Mahatma Gandhi and Mao Zedong.
For hundreds of years the protest march has been a means of voicing passionate concerns.
Whether protesting at injustice, challenging inequalities, fighting for better conditions or showing solidarity for fellow workers - demonstrating has been a way of focusing public anger.
While some mass demonstrations have ended in victory, others have led to retreat, defeat and sometimes tragedy. Defying the authorities can be a dangerous business.
In this two-part documentary, Michael Goldfarb examines the protest march as a force for change.
You are at the first episode