Dataset: Monarchies and republics in Europe (back to 1100) and the world (back to 1700). User smurfyjenkins, in the Datasets subreddit, 13 Jul 2020
CPS study: Why did monarchy rise and fall as a regime type? It arose due to problems with governing large populations across vast spaces but had its efficiency challenged by other methods of leadership selection when communication costs decline, lowering barriers to citizen coordination. Dataset. User smurfyjenkins, in the International Relations subreddit, 13 Jul 2020