The idea that your own happiness or suffering is created by your reaction to events rather than the events themselves is utterly Buddhist. But I wouldn't say t

The idea that your own happiness or suffering is created by your reaction to events rather than the events themselves is utterly Buddhist. But I wouldn't say that Buddhism was some Indian equivalent of Stocism. I also read about Epicurianism or even Cynisym and say "hey, that idea is totally the Buddhist, POV". I suspect the same can be done for other Indian schools. Sages of the axial age from around the old world discovered many similar good ideas, and people later built philosophical schools around them combining things in different ways. This is why I don't think there was much idea transfer between India and the West. They simply had the same good ideas. (But I am sure the Greek Buddhists of Ghandhara had a field day with the parallels. I wish we had written records of their ideas, to go with their art.)