Marketing to the bottom of the pyramid

[this short essay (long blog post) is inspired by and related to this video. You can engage one without the other, but they go together.]

Part 1: The bottom is important.

Almost a third of the world's population earns $2.50 or less a day. The enormity of this disparity takes my breath away, but there's an interesting flip side to it: That's a market of more than five billion dollars a day. Add the next segment ($5 a day) and it's easy to see that every single day, the poorest people in the...