I’m almost certain I believe in the “many worlds” interpretation of quantum physics – in the most practical sense, that all possible historical time-lines are fully realized.
For instance, we survived the Cuban Missile Crisis, and that’s why we are here to observe this world. But I believe that some 98% of all human time-lines came to a fiery end in 1962, when Kennedy and/or Khrushchev screwed the pooch.
One of the horrors of this view is that it is impossible for me to commit suicide: I can only exist in those worlds where I don’t do such a thing!
(There is no joy in this version of invulnerability. I might not be able to die in a car crash, but I can get terribly badly hurt!)