He pushes forward and mows down everything in his path until he reaches the beaches of Iberia. Europe is slaughtered. The Mongols estimated that they could push through Europe in 10 years, and by God, they would have done it. Cultural centers and bastions of Christianity are wiped out, as their rulers make the foolish mistake of refusing to surrender, a mistake which lead to the destruction of other civilizations the Mongols touched. Rome and all that it contains is razed to the ground. Ultimately, advances in mathematics, science, history, are reversed centuries. So much information is lost that it makes the Library of Alexandria fire look like the burning of a bookshelf at the public library. The Mongol invasion means that Europe does not advance enough to become the power that it is today. It starts to look far more like the Middle East or China, in terms of technological and societal development, and our contemporary standards of living is centuries away.