Sum up the essence of the second paragraph of the passage.
Directions: Answer the given question based on the following passage:
The crowds surged into the square in front of the Lincoln Memorial, a monument to the 16th American president and an avid campaigner for the liberation of black people from slavery. Tens of thousands of them had followed the call to ‘March on Washington for Jobs and Freedom’ on 28 August 1963 to demand work and equal rights for all the citizens of the USA. They arrived on special trains and in buses, singing all the way. Older black men dressed in their Sunday best; white students in T-shirts. Also present were actors and film stars like Josephine Baker, Marlon Brando, Burt Lancaster and Charlton Heston, as well as several American Congressmen. A quarter of a million people, black as well as white, had gathered for the biggest demonstration ever in Washington.
The government and many citizens were worried about the law and order. The sale of alcohol was banned on that bright August day. There were 4,000 soldiers present, with another 15,000 paratroopers on standby in the suburbs. The demonstration remained peaceful as the day wore on. As it turned increasingly hot and humid, Bob Dylan and Mahalia Jackson sang, and speaker after speaker stepped up with their demands for freedom. And then the last speaker took his place: the one they had all been waiting for—Dr. Martin Luther King, Jr.
King was the most important leader of the black civil rights movement. A charismatic speaker revered by many as an Afro-American Moses, he was, at the same time, a secret transgressor with innumerable affairs. Vilified by some as a dangerous radical and dismissed by others as a harmless Uncle Tom, the preacher of non-violent resistance would not have got far without the brutal excesses of his opponents. Finally, the future martyr of black America, who bore a cross-shaped scar on his chest from an earlier attack, began his speech. It was a speech which would make him immortal.
It had been 100 years since Abraham Lincoln started freeing the slaves in Southern America with his Emancipation Proclamation. Earlier, 10 Southern states, including Mississippi, Georgia and Alabama, separated from the United States and merged in 1861 as the Confederate States of America—in protest against the position against slavery adopted by many of the 23 Northern states, 19 of which had already liberated their slaves. (Excerpted from The Pastor and His Dream by Gesa Gottschalk)