Ever wondered if you are related to royalty? Well, certainly in Europe, you probably are.
I can trace my father's line back to the 1500s. Everybody has 2 parents, 4 grandparents, 8 great-grandparents and so on. Going back to the 1500s that means I needed over 8000 people to marry and have children. Going back just 10 more generations, way after Magna Carta, and I have over 16M ancestors, which is far greater than the whole UK population at that time!
Now I am sure some of my ancestors married distant relatives, so the number will be a bit less, but you get my point: if you go back far enough we are connected. If we go back to the time the Romans came to England certainly one of those is in my family tree.
This is humbling. Just think, we are only here now because those people had children. If just one had not, we would not be here now.