What are some of the things that have changed HISTORY?

Of course radio invention is a big change in history.

i think everything the someone do even if it was something small it's change the history but i still have some of my ideas about it like the world war 1 and 2 changed the history! and when the nuclear weapon made it's changed it tooo! And 11 September attacks! (i am sure no one forget that!) and many others and that's all what i have to say :)