Walk into any BJP office, and you will likely find two portraits displayed side by side: Dr Syama Prasad Mookerjee, founder of the Bharatiya Jana Sangh, and Pandit Deen Dayal Upadhyaya, who led the party after Mookerjee’s death. In the foreword to  Syama Prasad Mookerjee: Life and Times (2018) , authored by Tathagata Roy, former deputy prime minister L K Advani writes, “We in the BJP owe our position in Indian politics to the sacrifices of thousands who have preceded us, and above all to the vision and martyrdom of Dr Mookerjee.” “He not only founded a party, but also led a political movement that swam against the prevailing current of the times,” writes Roy. As Bengal turns a new political page under the BJP, a look at the life and times of one of its earliest architects. Mookerjee’s early life Syama Prasad Mookerjee, born on July 6, 1901, was the son of the eminent Indian mathematician and lawyer Ashutosh Mookerjee.…