It’s difficult to compare. Seatbelts alone have saved significantly more lives than every middle eastern intervention cost but it’s hard to say how long before someone else came up with them.

What would have happened without an open GPS? Without TCP/IP or all that medical research etc etc.

Now try to figure out what WWII would have looked like without lend lease etcand I just have no idea.

PS: I doubt most charities are a net positive impact, but again it’s complicated.