Here are some one liners...
A Witch-burning in Vienna: Releasing Frankenstein's Monster -- A family disagreement turns into a witch-burning (and I thought I had problems with my relatives.) As the government took official notice, the whole thing spiraled out of control.
Trial by Combat is Dead but the Idea is Not -- The last sanctioned court duel is done but the idea that God is on the side of the good guys is not.
Wallenstein and the Marshall Plan -- One of the great generals of the 30 years' War is born. He will suggest that the people who want a war ought to pay for it rather than squeezing the losers for it. That was the idea behind the Marshall Plan after World War 2.