Pie charts are good if you want to say e.g. "Hey! A large parr of our problems are caused by X!" That's actually what Florence Nightingale used them for when sh

Pie charts are good if you want to say e.g. "Hey! A large parr of our problems are caused by X!" That's actually what Florence Nightingale used them for when she popularized them, she showed the British military leaders that "Hey! Most of our troop deaths are caused by infections in soldiers with minor injuries! We can fix that!"