My thinking is that leftism is an echo of prosperity. Usually it is led by spoiled rotten brats of prosperous families. If you look at historical leftists, you learn this is the general rule, not the exception.
Mao, Marx, Lenin, Castro, and so forth were spoiled rotten rich kids.
Right thinking creates prosperity, and the second generation often turns to the left because they have no idea how things were before right thinking made things better.
I would like to claim this idea as my own, but it's a lot older than me.
So no, I don't think we will ever get rid of Leftism. It comes from human instinct modified by circumstances of prosperity.
Hardship keeps it at bay for awhile, but it returns when prosperity returns.
It really makes my butt tired to look at it that way. I really want evil to admit it lost and stop bothering people, but I guess that won’t happen until Our Lord comes again in glory.