6 ms·

You need free time to come up with it

• someguydave 5y ago
  all of humanity was so close to the verge of starvation for millennia that they couldn’t arrange some wood and string to make weaving way more efficient (and thereby make themselves fat and happy)? this idea seems unlikely.
  • e9 5y ago
    If you had to do hard physical labor every day from dawn to dusk and then deal with family of probably 5+ children, do you really want to spend your limited free time working on improving anything?