What was the biggest reason for the Mongols expanding the empire?

Explain in the simplest form what laissez faire is

Many scandinavians immigrated to the united states as a result of the homestead act of 1862, which offered land to independent farmers. this is an example of a push factor, because turmoil in scandinavia encouraged people to leave. push factor, because a new opportunity encouraged people to come to the us. pull factor, because turmoil in scandinavia encouraged people to leave. pull factor, because a new opportunity encouraged people to come to the us.

Does anyone know the song that xxxtentacion sings and when he says "hey is your neck game sloppy' i need to know what son that is hurry