"A truly monumental work, as elegant as it is insightful."
-ELIZABETH MARSHALL THOMAS
Author of The Hidden Life of Dogs
"A BRILLIANT, LIBERATING BOOK ON A PROFOUNDLY IMPORTANT SUBJECT."
Author of Consilience
"THOROUGH, THOUGHTFUL, AND CLEARLY WRITTEN . . . A TROVE OF FACTUAL TREASURES . . . A cornucopia of data and ideas about the biology and behavior of mothers great and small."