Q. When was sliced bread invented?
A. 1928. Although a prototype was built in 1912, a fully working machine was not built until 1928.
So, what was invented after 1928 that has changed the world?
Hmmm .....
The Atomic bomb.
Detrimental to society, but has any one thing changed the face of the modern world other than the atomic/hydrogen bomb? It changed the world, the nature of war changed totally and political relations changed forever. The world has not been the same since.
It's not a great invention in terms of it's effect on the planet, but an important one none the less.