The history we "hear" and the history we are taught often come from tradition, which can be horribly skewed, and or the propaganda stories as told by those in power. Over and over and over again throughout the history of mankind the stories told around the fireplaces and later written down, after writing was invented, were the versions of the storytellers themselves, and none to be the wiser. It is, however, well known that The Tudors did not tolerate anyone publishing anything not favorable to their version of the facts, and they really had to cover up an awful lot of illegal wheeling and dealing, not to mention slandering, thieving and murdering! So it could well be publish AND perish, back in the day! And tyrants love nothing so much as a scapegoat! Off with his head, and whoops, forget HIM!
For example, suppose those who fervently believe some of the total lies told in blatant disregard of the facts in our times came to be in charge of our main textbook publishers. There would be whole chapters on how a Muslim born in Kenya cheated and stole his way, from infancy mind, into the presidency, including the conspiracy to publish his birth in local Hawaiian newpapers at the time! Wow! What a conspiracy to be a part of for more than half a century until you get that baby taking the oath of office! But the thing is, approximately 33% of our citizens BELIEVE this. So you can still sell just one whole heck of a lot of snake oil!
Our historians have much more accurate methods through records people actually kept in their homes, businesses, estates, libraries, attics, trunks, government and business archives, etc., to get to the truthful nitty gritty of it all. Thus so called revisionist history is quite frequently much closer to what the reality was.
Remember this about Thomas Cromwell: they were very swift to CUT HIS HEAD OFF. No feedback from HIM!