For one literacy right now is ~100% and has never been anywhere close to that until 50-60 years ago.
Literacy.
Percentage of children to survive to adulthood.
Global food surplus.
The was a big phase shift over the course of the 20th century...
alt Hacker News
Literacy.
Percentage of children to survive to adulthood.
Global food surplus.
The was a big phase shift over the course of the 20th century...