Ask HN: Which period of humanity would you like omniscience?

If you could have complete knowledge of any period in human history listed below, which would you pick? This knowledge cannot be used or shared. It is simply knowledge for the sake of knowledge.

Roughly:

  64 MYA - 5 MYA
  5 MYA - 800,000 BC
  800,000 BC - 100,000 BC
  100,000 BC - 10,000 BC
  10,000 BC - 2,000 BC
  2,000 BC - 0
  0 - 700 AD
  700 - 1492
  1492 - 1776
  1776 - 1919
  1919 - Present day
  Present day - 2150

I chose these dates based on how I roughly delineate important sections of history. There is more wiggle room as we travel backwards. I of course have a hard time picking one period as they are all fascinating. There have been so many mysteries in the post WWI period that I have to pick 1919 - Present day. Maybe their relevance to me reveals a self centered part of my self.