As the Central government decided to bestow Bharat Ratna on former Bihar Chief Minister and pioneer of layered reservation Karpoori Thakur, the social engineering politics of the Bharatiya Janata Party (BJP) has apparently taken a new turn. Coming at a time —just months before the Lok Sabha elections— when the opposition alliance is trying to bank on the promise of caste census, political observers think the selection of an extremely backward class (EBC) leader could be a political masterstroke.