You may be surprised to hear that knowing how to swim is still far from a universal skill.
Re:Lifehacks from 100 Years Ago
by sliverstorm on Wednesday July 17, 2013 @06:15PM
(#6060436)
I know, but I think it is more universal than it used to be.
... those unable to swim are safely passed over.
Knowing how to swim was not a universal skill, much like knowing how to read or write.