This subject is of the utmost importance, as evidence is continually repressed by the establishment (not just a conspiracy theory), but new findings are making their way into the mainstream. How would this knowledge (if proven to your satisfaction) affect you? What would change if you realized:
1. There was a technologically advanced society on Earth that was destroyed before our current civilization developed.
2. Our current civilization is hiding proof of their existence
3. Total destruction of a society is possible as it has happened before (and could happen again).
We need to understand our past in order to understand who we are and where we are going!