In my family, as in most middle-class Indian families I knew when I was growing up, science and mathematics were held in awe.

When I was growing up in the south Indian city of Madras, there were only two political parties that mattered; one was run by a former matinee idol, and the other was run by his former screenwriter.

An honest politician has no goodies to toss around. This limits his effectiveness profoundly, because political power in India is dispersed throughout a multi-tiered federal structure; a local official who has not been paid off can sometimes stop a billion-dollar project.

Indians mock their corrupt politicians relentlessly, but they regard their honest politicians with silent suspicion. The first thing they do when they hear of a supposedly 'clean' politician is to grin. It is a cliche that honest politicians in India tend to have dishonest sons, who collect money from people seeking an audience with Dad.