Central Point 

If we all came from a singular start we are then all connected part of the same reality. Anything that one does effects everything else because we are in the same space. As others have eluded to and Einstein stating, energy can not be created nor destroyed. Essentially energy is transfered in different forms, and because energy is being constantly transfered any small transferance will effect everything in the same realm, our universe/dimension.

I believe I don’t need to provide an example as there are many that currently come to mind. 

Destination Limbo out,