While not practical for operations which very low processing times and correspondingly high change-over times (both values defined by takt time), it is nevertheless a Lean Manufacturing goal to achieve single piece flow in every operation possible. Achieving one-piece flow requires the elimination of waste.
Throughout human history, most people live and die in the social class into which they were born. If they were born poor, chances are they will die poor. One way societies can help people rise in social class is to initiate new enterprises, like improved educational opportunities or technological advancements.
There is lots of good stuff there, but consider this article: Why Is Haiti So Poor? The wealth of nations, or lack thereof, is a topic of longstanding interest. Haiti and the Dominican Republic, which share the island of Hispaniola, are something of a laboratory experiment, a bit like East and West Berlin. Manhattan Contrarian notes that Haiti is, by any measure, one of the worldâs poorest countries, and asks why. The first hypothesis tested is that Haiti is dirt poor because it is pretty much all black.