In 1776, Thomas Jefferson wrote that all men are created equal, endowed with unalienable rights... life, liberty and the pursuit of happiness. During his lifetime Jefferson owned more than 620 slaves. As America marks 250 years since the Declaration, that contradiction is impossible to look past: a document of universal liberty, written by men who denied it to the women in their households, the people they enslaved, and the nations whose land they were settling.

One reading says this was hypocrisy - that "all men" never meant all men, that the rhetoric of equality was cover for the interests of rich, white, Anglo-Saxon Protestants, and that the centuries of struggle since have been a slow correction of a lie dressed up as a promise. Another reading says something genuinely radical was set loose that day - a principle larger than its authors, one that would eventually demand Abolition, Enfranchisement and the end of Segregation, precisely because the words of the Declaration meant more than the men who put their names to it could envisage. On this account, the Founding Fathers endorsed an ideal and left their descendants to grow into it.

That same split runs through America today. The current presidency has departed from constitutional norms everyone had assumed were solid - over courts, elections, the press and the limits of executive power. One view says this is a crisis the Republic will survive: a serious one, but a blip in the two and a half centuries during which American institutions have weathered civil war, economic depression, and social upheaval, and during which the founding ideals have always held firm. The soul of America gets shaken, but it holds. The other view says the Republic was never held together by Constitutional Law - it was held together by a myth - a shared belief, perhaps deluded, that Americans would behave decently and that the norms would prevail. Once a leader has tested every one of those boundaries and paid no price, the myth shatters, and there is nothing to stop the next leader from going further. On this view, the current administration is a distorted reflection of what America truly is.

Chair: Michael Buerk Panel: Giles Fraser, Carmody Grey, Matthew Taylor and Tim Stanley. Witnesses: Richard Carwardine, Aziz Rana, Adam White and Claire Ainsley. Producer: Dan Tierney Assistant Producer: Pater Everett Editor: Tim Pemberton