Wow…a lot of important material at that website. Most of it is directly about soecific victims and survivors, but I also recommend this recent essay by a Caltech grad reflecting on the tragedy and linking it to his own hazing experience (and to the current US political climate): https://jonestown.sdsu.edu/?page_id=81378
A few years ago, I read an excellent biography of the 1850s anti-slavery activist John Brown. For me the paradox of Jonestown is embodied in how it both resembled Brown’s utopian community in the Adirondack Mountains of New York State — a (failed) agricultural project in the wilderness, with blacks and whites living and working together as equals, astoundingly radical for its time — AND it resembled an antebellum Southern US plantation, the very system that Brown was fighting so hard to abolish.
This latter resemblance was noted in an article in that website — yes, Jonestown was generally color-blind, and its attraction to African American women in particular was understandable — BUT whites were mainly in charge of things, and the rule against anyone leaving (black or white, that’s true) was reminiscent of slavery.