Science suggests that there are unusual things happening in the brains of power-holders. Decades of study have shown that the psychology and physiology of powerful people are notably different from those of average people – down to the architecture of the brain’s prefrontal cortex, and the way the heart pumps blood.

Hallowe’en By Robert Burns, 1759 – 1796 Upon that night, when fairies light On Cassilis Downans dance, Or owre the lays, in splendid blaze, On sprightly coursers prance; Or for Colean the route is ta’en, Beneath the moon’s pale beams; There, up the cove, to stray and rove, Among the rocks and streams To sport that night. Among the bonny …