I know that my Buddhist practice has changed the way I interact with everything and everyone in my own personal Universe.
The change is difficult to explain, and even more difficult to prove, over the relatively short term, to others within that Universe.
Those difficulties are still further compounded by the fact that no matter how radical the changes, nothing can change the past.
Like karma, my past was formed from the past causes I made. What I can do, is to try to make better causes now, and in the future. What I can not do, is influence the past.
That limitation is, I have to say, a very real sadness on this journey towards a happier and more enlightened future. However, the changes I am making now, appear to be creating a better and brighter future for everyone.