It seemed hypocritical for them to show such deferential concern over a nudge with a foot when, minutes before, they'd all but pushed one another out of the windows. Now, long years and many journeys after that first ride on a crowded rural train, I know that the scrambled fighting and courteous deference were both expressions of the one philosophy: the doctrine of necessity. The amount of force and violence necessary to board the train, for example, was no less and no more than the amount of politeness and consideration necessary to ensure that the cramped journey was as pleasant as possible afterwards. What is necessary? That was the unspoken but implied and unavoidable question everywhere in India.