Perhaps Our Greatest Distinction As A Species

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.

Although Native Africans Domesticated Some Plants In The Sahel And In Ethiopia And In Tropical West Africa, They Acquired Valuable Domestic Animals Only Later, From The North.

History Followed Different Courses For Different Peoples Because Of Differences Among Peoples' Environments, Not Because Of Biological Differences Among Peoples Themselves

Take Air Quality In The United States Today: It's About 30 Percent Better Than It Was 25 Years Ago, Even Though There Are Now More People Driving More Cars.