Radiation is not that important to an individual.... I think that radiation and the random mutations associated with it have helped us evolve... so we should accept it as part of our history... but we should not have irrational fear of it.

Look up the Oklo reactor, it certainly had influence on our evolution... and there were probably a million other strong influences- its all just chance, we obviously made it this far, but we need to accept it was many lucky rolls of the dice- we know we almost died out during the ice age- its likely that one stone age leader made a decision that saved us all... It isnt terribly hard to kill a human, but- so far- its damn near impossible to kill humanity...