From Hume's History of England
Now that's how a King (or even usurper) should carry himself:
Edward entered the capital amidst the acclamations of the citizens, and immediately opened a new scene to his party. This prince, in the bloom of youth, remarkable for the beauty of this person, for his bravery, his activity, his affability, and every popular quality, found himself so much possessed of public favor, that, elated with the spirit natural to his age, he resolved no longer to confine himself within those narrow limits which his father had prescribed to himself, and which had been found by experience so prejudicial to his cause. He determined to assume the name and dignity of king; to insist openly on his claim; and thenceforth to treat the opposite party as traitors and rebels to his lawful authority. But as a national consent, or the appearance of it, still seemed, notwithstanding his plausible title, requisite to precede this bold measure, and as the assembling of a parliament might occasion too many delays, and be attended with other inconveniences, he ventured to proceed in a less regular manner, and to put it out of the power of his enemies to throw obstacles in the way of his elevation. His army was ordered to assemble in St. John’s Fields; great numbers of people surrounded them; an harangue was pronounced to this mixed multitude, setting forth the title of Edward, and inveighing against the tyranny and usurpation of the rival family; and the people were then asked whether they would have Henry of Lancaster for king. They unanimously exclaimed against the proposal. It was then demanded whether they would accept of Edward, eldest son of the late duke of York. They expressed their assent by loud and joyful acclamations. A great number of bishops, lords, magistrates, and other persons of distinction were next assembled at Baynard’s Castle, who ratified the popular election; and the new king was on the subsequent day proclaimed in London, by the title of Edward IV.
An attempt to roll it all back:
They expressed their abhorrence of the usurpation and intrusion of the house of Lancaster, particularly that of the earl of Derby, otherwise called Henry IV.; which, they said, had been attended with every kind of disorder, the murder of the sovereign, and the oppression of the subject. They annulled every grant which had passed in those reigns; they reinstated the king in all the possessions which had belonged to the crown at the pretended deposition of Richard II.; and though they confirmed judicial deeds and the decrees of inferior courts, they reversed all attainders passed in any pretended parliament; particularly the attainder of the earl of Cambridge, the king’s grandfather; as well as that of the earls of Salisbury and Glocester, and of Lord Lumley, who had been forfeited for adhering to Richard II.
Hume, adherent of rule of law, lover of institutional stability scoffs:
Many of these votes were the result of the usual violence of party: the common sense of mankind, in more peaceable times, repealed them: and the statutes of the house of Lancaster, being the deeds of an established government, and enacted by princes long possessed of authority, have always been held as valid and obligatory. The parliament, however, in subverting such deep foundations, had still the pretence of replacing the government on its ancient and natural basis: but in their subsequent measures, they were more guided by revenge, at least by the views of convenience, than by the maxims of equity and justice. They passed an act of forfeiture and attainder against Henry VI. and Queen Margaret and their infant son Prince Edward.
What a great passage to shed light on the time period:
There is no part of English history since the conquest so obscure, so uncertain, so little authentic or consistent, as that of the wars between the two “roses:” historians differ about many material circumstances; some events of the utmost consequence, in which they almost all agree, are incredible, and contradicted by records; and it is remarkable, that this profound darkness falls upon us just on the eve of the restoration of letters, and when the art of printing was already known in Europe. All we can distinguish with certainty through the deep cloud which covers that period, is a scene of horror and bloodshed: savage manners, arbitrary executions, and treacherous, dishonorable conduct in all parties.
Edward IV as ruler:
But this prince, who had been so firm, and active, and intrepid during the course of adversity, was still unable to resist the allurements of a prosperous fortune; and he wholly devoted himself, as before, to pleasure and amusement, after he became entirely master of his kingdom, and had no longer any enemy who could give him anxiety or alarm. He recovered, however, by this gay and inoffensive course of life, and by his easy, familiar manners, that popularity which, it is natural to imagine, he had lost by the repeated cruelties exercised upon his enemies; and the example also of his jovial festivity served to abate the former acrimony of faction among his subjects, and to restore the social disposition which had been so long interrupted between the opposite parties. All men seemed to be fully satisfied with the present government; and the memory of past calamities served only to impress the people more strongly with a sense of their allegiance, and with the resolution of never incurring any more the hazard of renewing such direful scenes.