"Capitalism and socialism are mutually extinct. Why? Because science now finds there can be ample for all, but only if the sovereign fences are completely removed. The basic you-or-me-not-enough-for-both— ergo someone-must-die tenets of the class warfaring are extinct. p. 39"
January 1, 1970
https://en.wikiquote.org/wiki/Operating_Manual_for_Spaceship_Earth