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Spain wished to compete with Portugal for trade.
They knew the Greek idea of direct democracy. While they didn't necessarily apply the idea in their political system directly, they did apply some ideas that were shared with the Greeks that made the Roman political system more stable and better in the end.
Heinrich Himmler implemented Hitler's Holocaust plan to uproot eastern Europeans and send German peasants to colonize their land. They were Nazis and Himmler was responsible for the Holocaust, and directed the mass killing of six million Jewish people, and many other ethnicities. He later committed suicide in the British custody.