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In social relationships--whether between mates, parents and offspring, or friends--we find much of life's meaning. But in these relationships, so critical to our well-being, might we also detect the workings, even directives, of biology? This book, a rare melding of human and animal research and theoretical and empirical science, ventures into the most interesting realms of behavioral biology to examine the intimate role of endocrinology in social relationships.

The importance of hormones to reproductive behavior--from breeding cycles to male sexual display--is well known. What this...

In 1918, the British Expeditionary Force (BEF) played a critical role in defeating the German army and thus winning the First World War. This 'Hundred Days' campaign (August to November 1918) was the greatest series of land victories in British military history. 1918 also saw the creation of the Royal Air Force, the world's first independent air service, from the Royal Flying Corps and the Royal Naval Air Service. Until recently, British histories of the First World War have tended to concentrate on the earlier battles of 1916 and 1917 and often underplayed this vitally important...