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Most of us take for granted the features of our modern society, from air travel and telecommunications to literacy and obesity. Yet for nearly all of its six million years of existence, human society had none of these things. While the gulf that divides us from our primitive ancestors may seem unbridgeably wide, we can glimpse much of our former lifestyle in those largely traditional societies still or recently in existence. Societies like those of the New Guinea Highlanders remind us that it was only yesterday—in evolutionary time—when everything changed and that we moderns still possess bodies and social practices often better adapted to traditional than to modern conditions.The World Until Yesterday provides a mesmerizing firsthand picture of the human past as it had been for millions of years—a past that has mostly vanished—and considers what the differences between that past and our present mean for our lives today.

This is Jared Diamond’s most personal book to date, as he draws extensively from his decades of field work in the Pacific islands, as well as evidence from Inuit, Amazonian Indians, Kalahari San people, and others. Diamond doesn’t romanticize traditional societies—after all, we are shocked by some of their practices—but he finds that their solutions to universal human problems such as child rearing, elder care, dispute resolution, risk, and physical fitness have much to teach us. Provocative, enlightening, and entertaining, The World Until Yesterday is an essential and fascinating read.

In her acceptance speech for Mark Twain Prize for American Humor, Tina Fey announced that she was proud to make her home in "the 'not-real America'". It is perhaps that healthy sense of incongruity that makes the head writer, executive producer, and star of NBC's Emmy Award-winning 30 Rock such a cogent observer of the contemporary scene.

Bossypants, her entertaining new memoir, shows that strangeness has been her constant companion. Fey's stories about her childhood in Upper Darby, Pennsylvania are only appetizers for LOL forays into her college disasters, honeymoon catastrophes, and Saturday Night Live shenanigans. Most funny read of the month; the best possible weekend update.