In commemoration of Martin Luther King Jr., I offer three quotes (short excerpts) from his speach Beyond Vietnam, from 1967.
[...] They asked if our own nation wasn't using massive doses of violence to solve its problems, to bring about the changes it wanted. Their questions hit home, and I knew that I could never again raise my voice against the violence of the oppressed in the ghettos without having first spoken clearly to the greatest purveyor of violence in the world today: my own government. For the sake of those boys, for the sake of this government, for the sake of the hundreds of thousands trembling under our violence, I cannot be silent.
The war in Vietnam is but a symptom of a far deeper malady within the American spirit, and if we ignore this sobering reality, we will find ourselves organizing "clergy and laymen concerned" committees for the next generation. They will be concerned about Guatemala and Peru. They will be concerned about Thailand and Cambodia. They will be concerned about Mozambique and South Africa. We will be marching for these and a dozen other names and attending rallies without end unless there is a significant and profound change in American life and policy. So such thoughts take us beyond Vietnam, but not beyond our calling as sons of the living God.
It is a sad fact that because of comfort, complacency, a morbid fear of communism, and our proneness to adjust to injustice, the Western nations that initiated so much of the revolutionary spirit of the modern world have now become the arch antirevolutionaries. This has driven many to feel that only Marxism has a revolutionary spirit. Therefore, communism is a judgment against our failure to make democracy real and follow through on the revolutions that we initiated. Our only hope today lies in our ability to recapture the revolutionary spirit and go out into a sometimes hostile world declaring eternal hostility to poverty, racism, and militarism. With this powerful commitment we shall boldly challenge the status quo and unjust mores, and thereby speed the day when "every valley shall be exalted, and every mountain and hill shall be made low; the crooked shall be made straight, and the rough places plain."
—Martin Luther King, Beyond Vietnam, 1967.
The rest of this speach also includes an interesting history of the Vietnamese conflict.