Conveniently starts in the 80s

The 80's was 40 years ago; if it conveniently started like five or ten years ago you'd have a point, but 40 years is a gigantic period of time to have no wars. How long of a period do you require? 100?

The reason we can criticize our own leadership is because we never stopped; we can't seriously claim we're not making the mistakes of the past while continuing to do them non-stop up to the present day. Even if the person who made the pic included China's Vietnam war era, the picture would still be a damning indictment for that gigantic gap of no wars.