Isn't it interesting that it's seemingly only self-made millionaires/billionaires who are pledging the bulk of their self-made fortunes away? That despite them doing this, we're not seeing "old" money following suit?
I've had this debate with others before, and "self-made" overall tends to mean that an individual did something in isolation. I.e. It plays into the narrative that "no man is an island" and that we all owe our gratitude to the society we were part of, as if the society had some direct doing in it.