Well, everyone forgets (or never knew) that there was a third heir to the throne who came before Richard: his older brother George’s young son, Edward. He lived with Richard’s family in Yorkshire and was eventually murdered by...Henry VII.
Drat. I’ll have to listen to the whole 12-hour set of “War of the Roses” lectures again, because I’ve forgotten, like, *everything,* and it’s only been a couple of months!
But Shakespeare was a flack for the Tudors.