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.
I think that tolerant people who don't tolerate somebody because he is intolerant go against tolerance because they don't accept a way of thinking. Tolerant people should in my opinion accept every point of view even if they disagree. I know it's hard to tolerate intolerance but people who do it are real tolerant people and are in my opinion wise people. Life is always easier when you accept all, you don't go against the things, you just let the things be like they are.