If the majority of humanity met an untimely demise, what would be the vital knowledge that you have to restoring the world as we know it? It could be musical knowledge, knowledge of building partnerships, how to make things, mathematics, art, etc. All of these things make up the world we live in today, without them the world would be a much worse place.
There are ways to protect knowledge. Write it down. Store it on a computer in a bunker, bury books on the subject in your yard. There may be even crazier ideas out there, but there is a much simpler one, share it.
On a personal level, using knowledge too rarely leads to loss of it, so teach someone. A coworker, a community, a spouse, a child, or a class. Find someone interested in what you know and teach them. By building in redundancy through sharing what you know, you may even save humanity as we know it in the case of a post-apocalyptic future.
The sentiment here is true even if I don’t believe the apocalypse is coming. Share your knowledge, it will likely make the world a better place.
Thanks to Ed Domich for a conversation that inspired this post.