Christman had a bonus episodes about Butler and Wallace on Hell of Presidents I'm pretty sure, and they go into it on Hinge Points as well. So very Chapo-y and I'd be interested in other, more typically "scholarly" perspectives too.

I don't know if the serious types ever delve into alt-history, which would make sense if they didn't, it's all speculation and quickly becomes a wish fulfillment fantasy, at least when I do it in my musings. I guess actually it's really sad I find it easier to imagine different pasts, and their consequent lost futures, than seeing much hope in this current world. Still mostly not a doomer though!