@Harp The way I see Karma is as putting a kind of energy into the world and being an example. When you return a wallet that fell out of a pocket, or give food to someone hungry, or drive without responding to others’ road rage, or put trash in the garbage and pick up after other people; when you never say, “that’s not my job,” other people see it, and it becomes easier for them to do the same thing. People are nicer when they believe others will be nicer to them.
Malcolm Gladwell, of “Tipping Point” fame, suggested that courtesy is something for which there is a tipping point. Also crime and cleanliness, I think. If you reach a critical mass of people behaving a certain way, all of a sudden everyone starts doing it. It becomes part of the culture.
@mattbrowne Tipping points actually are something that can be measured. It might take enormous resources to do it, but it can be measured, because there are specific behaviors you are looking at, not some magical concept of what goes around comes around.
However, if tipping points are real, then what goes around does come around. Everyone should be a model for others, or think of themselves as a model. What you do and how you behave matters. You help someone in need, and then, some day, someone helps you when you need, because the culture has turned into that kind of attitude.
Generosity and kindness and politeness make a huge difference. It can be helped along with a little moderation, as we see on this site, but it comes just as much from people providing a good example as it does from moderators removing comments.
That’s how I think of karma. It’s a real thing, for me. It may not work in the way most people, or even religions imagine it, but it works, and there is even evidence to suggest it does work.