This pin is very informative on the different aspects of stress. One section is on the types of stress, which are acute stress and chronic stress and what the differences are. It also clarifies the difference between Eustress and Distress.
This image hit me pretty hard. The "War to End All Wars". They fought and died in the first "mechanized" war so the world would not forget the horror of armed conflict. And then the world forgot, and forgot again, and forgot again, and .