Future
I think in my lifetime the biggest problems we will be facing are global warming and pollutions, if it’s beyond my life time I definitely can imagine people start to migrate to different planet, and somehow people who migrates to different planet they will start claim they as the better race or think they are the “upper-class “have more privilege than he people still staying on earth, and we might run into aliens, and there is a highly chance we will start a war between them.