Susan Sontag wrote about this in "Regarding the pain of others". Basically as soon as we had the means to know what is happening around the world almost instantly (at least as soon as the information is properly formatted) we opened this exposure to the collective suffering of the entirety of the human race. It is not something one can run from and everyone will eventually be exposed to it. The article goes more into detail of the naturalization of suffering and the ideia that knowing the horrors by recounts and pictures we think we know the horrors themselves. It is very well worth the read.