Would Philosophy/Science Come Back?

I once argued that Philosophy, like Science, would eventually come back following a catastrophe that would wipeout all human knowledge. However, if we look throughout our history we understand that the stars would need to be perfectly aligned for either to come back...

• For thousands of years of recorded history people who have pursued ideas that were against the status quo, or religious beliefs, of their time could be prosecuted and put to death.
• For ideas to flourish, we must be living where our survival needs are met.
• It's rare for a civilization to allow, or consider, the pursuit of wisdom as a valuable endeavor.
• It's rare for an individual to want to pursue wisdom (even today) - only a small fraction of the billions of humans that have ever existed have been known for their contribution to science/philosophy.
• The event that caused the destruction of knowledge could deter future generations of attempting the pursuit of science/philosophy as to not replicate said catastrophe.

I hope we never loose the knowledge that we've acquired as it could take thousands of years to reach this point again - this is assuming that humans would still be around following the even that wipe out all of our knowledge.