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This inquiry begins with the puzzle of sibling relations. Why are individuals from the same family little more similar in personality than people from different families? Why doesn't a shared family environment lead to similar values and beliefs? Sulloway suggests a fresh way of understanding how family affects individual development. Among siblings, the most important factor for systematically understanding the sources of individual differences is birth-order. This work shows how birth-order is...

A New Statesman Book of the Year The wolf stands at the forefront of the debate about our impact on the natural world. In one of the most celebrated successes of modern conservation, it has been reintroduced to Yellowstone National Park. What unfolds is a riveting multi-generational saga, at the centre of which is O-Six, a charismatic alpha female beloved by park rangers and amateur spotters alike. As elk numbers decline and the wolf population rises, those committed to restoring an iconic lan...

The genetic history of the dog is a sensational example of the co-evolution of two species, man and wolf, to each other's mutual benefit. But how did this ancient partnership begin? To answer this question, Professor Bryan Sykes identifies tantalising clues in the recently mapped genetic makeup of both species. Sykes paints a vivid picture of the dog as an ancient and essential ally. While undoubtedly it was the mastery of fire, language and agriculture that propelled Homo sapiens from...