One of the best things I've done for myself is to stop reading the news. You will not believe how this ignorance has led me to a calmer life, to the gasp and concern of my peers, wondering how am I able to cope, to exist, without knowing what happens "in the world?"
As you say, anyone has 1 unit of attention, and unlike many other things, it is fully in our control. The biggest lie modern generations have been told is that the more knowledge about things, the greater the happiness. That you need to know what happens half a world away from you, often in more detail than what happens at your doorstep.
What saddens me the most about the future generations is seeing how politicised they has become, politics the game of rich old people; the powers that be have figured out that if they turn what happens in the palace into entertainment, people are distracted and don't get into them silly ideas like trying to change things. These days politics is slapstick comedy for "grown ups", and it's sad to see it infect the younger generations now.