Thank you for this summary of the four-America history. I generally agree with your outline. I would add it’s my belief that the end of fourth America is being accelerated by our current and growing climate emergency. Also, any emergence of a fifth America will be made impossible by the climate emergency as living conditions evolve into an unavoidable global catastrophe defined by scarcity, conflict, desperate migration, and economic collapse. We will be surviving in fragments of society here and there as we humans try to adjust to climate chaos.