There's no shortage of gloom-and-doom viewpoints about humanity: our history of violence and war, environmental profligacy, economic and social injustice, etc. Frank S. Robinson has written this "optimist manifesto" as an antidote to such poisonous pessimism. Here you will find some radical and refreshing assertions: that most people are fundamentally good, that global society is getting better all the time, and that, in the big picture, humankind is not at the end of a brief, tragic existence but, rather, has just embarked on a long, bright future.

What started as an extended letter to...