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Federal Elections Happen Every Two Years In This Country. Presidential Elections Every Four Years. And Four Years Just Isn't Long Enough To Dismantle All The Environmental Laws We've Got In This Country.

Introspection And Preserved Writings Give Us Far More Insight Into The Ways Of Past Humans Than We Have Into The Ways Of Past Dinosaurs. For That Reason, I'm Optimistic That We Can Eventually Arrive At Convincing Explanations For These Broadest Patterns Of Human History.

I've Always Been Interested In A Lot Of Things, And A Lot Of Things At The Same Time, And I Always Tried To Explain Them To Myself. I Ask A Lot Of Questions.

[t]he Values To Which People Cling Most Stubbornly Under Inappropriate Conditions Are Those Values That Were Previously The Source Of Their Greatest Triumphs.

Our Biggest Threat Is Not An Asteroid About To Crash Into Us, Something We Can Do Nothing About. Instead, All The Major Threats Facing Us Today Are Problems Entirely Of Our Own Making. And Since We Made The Problems, We Can Also Solve The Problems.