Summarize King's main argument. Do not simply state that he supports equal rights or is against racism; be specific?

The letter is to explain the both religious and humanitarian justice within the context of race. The work is written not to inspire a black audience, but to convince and persuade a white audience. And at its core, it is a declaration of the power of the black man, whom Dr. King writes endured and survived slavery, and who will one day be recognized as the true heroes of the age.