Did the Black Death and the Pandemic Wish Change Society?

The mongol knew about the plague well before, and that plague was in the mongol empire before. They had their own ways to deal with it - like sanitary policy. But they did not expect western europe or the middle east would be so unprepared facing the plague. And i think that was actually even worse for the mongsol than having their own internal problems with the plague. Suddenlyto the world around them suddenly collapsed, in a way. It's not only because of the plague, but it's er, we must take it into account.