Wheellock
TL;DR
Wheellock - requires enrichment with adjacent possible narrative
Sometimes attributed to Leonardo da Vinci, in a drawing from the 1490s or the 1500s, but may also be from an anonymous German mechanic.
What Had To Exist First
Preceding Inventions
What This Enabled
Inventions that became possible because of Wheellock:
Biological Patterns
Mechanisms that explain how this invention emerged and spread: