You have little power over diseases without technology, not to mention that a disability may render you worthless/good as dead so you can count me out of this "

You have little power over diseases without technology, not to mention that a disability may render you worthless/good as dead so you can count me out of this "back to the cave" movement. If you want ultimate "tranquility" build a spaceship and conquer the ultimate frontier alone. Nobody will bother you in the cosmic void.