daydrinkingchickadee@lemmy.ml to Memes@lemmy.ml · 2 days agoSoonlemmy.mlimagemessage-square89fedilinkarrow-up1817
arrow-up1817imageSoonlemmy.mldaydrinkingchickadee@lemmy.ml to Memes@lemmy.ml · 2 days agomessage-square89fedilink
minus-squaredaydrinkingchickadee@lemmy.mlOPlinkfedilinkarrow-up4·2 days agoCliodynamics and Structural-Demographic Theory suggests cycles of 200-300 years as well.
Cliodynamics and Structural-Demographic Theory suggests cycles of 200-300 years as well.