Will USofA Be Here in 250 Years?

In the lifetime span of civilized nations of the world we, the USofA, seem to be in the "terrible two's" phase of development...Reason and learning are resisted as being too boring, in our greed for a more comfortable life style we blow the tops off mountains (for coal), pollute our waterways and atmosphere, lie to protect us from paying the consequences of our actions and have temper tantrums (wars) when opposed by more rational minds. I wonder if this nation, as it is today, will still be in existence in 250 more years?