Ours is a society where many get by on provocation, the tactless but effective tool of pedalling outrage - and we all too quickly take the bait. If outrage has become abundant, activism has definitely become subdued. There is still much to be outraged by in our final frontier - the gender pay gap, racial bias, gun control - but in order to enact change, we must learn to channel our responses. This is the essential guide to living through the age of outrage.