Mahatma Gandhi was the prominent figure who advocated for nonviolent resistance against British rule in India. Through principles of nonviolent civil disobedience and peaceful protest, Gandhi sought to unify Indians against colonial oppression, leading to significant political and social changes. He played a critical role in mobilizing the masses for India's independence, promoting the idea that moral and ethical resistance could achieve political goals without resorting to violence. His philosophy and strategies for social activism influenced many leaders globally, contributing to movements for civil rights and freedom worldwide.