In 1946, Muhammad Ali Jinnah’s direct action day call catalysed large-scale conflagrations in Bengal, the fires of which would soon be carried across to the other parts of India by the headwinds of communal hatred that had been roiling the country in the run-up to the Partition. As religious hostilities tore India apart, MS Golwalkar, the monkish, bespectacled leader of the Rashtriya Swayamsevak Sangh (RSS), saw an opportunity to reinvigorate the Hindu revivalist organisation he had been meticulously chiselling into shape as its second sarsanghchalak. Six years before this episode, the RSS had faced a crucial setback following the British...