Sorry about the late publication today -- medical issues

Anyway... are we taking enough care to ensure that the sum of mankind's knowledge will still be accessible in the event of some apocalyptic event such as nuclear war, meteorite strike or CME?
If we end up moving all our knowledge and information to computer-based systems (as we are rapidly doing) then do we not significantly compromise our ability, as a society, to recover from such a catastrophic and potentially existential event?
And, with much of the newly published content going straight to the cloud, bypassing print altogether, would this be lost completely?
Where are our real-world backups?