The timescale of the book is staggering. It's like that 'pale blue dot' picture.
http://www.wscribe.com/parables/pass.html
For those that haven't read the book or that don't have access to it, the book follows the 'first men' (us) and their successors across billions of years. Not all movement in time is progress and not all change is natural. Very much recommended, I won't write any more here to not spoil the book for future readers.
Cut them some slack. If they say anything different it's likely some lunatic will label them "unamerican". While the country, as it presently stands, will not endure for long in a planetary timescale, we'll be fortunate if some of the core ideals behind its foundation last for a longer time and help guide our descendants into the deep future.
Do you think 'Last and First Men' changed your perspective?