Because it was only one king and queen
The person who has been known up until today as the "father of modern economics" is Adam Smith. A thinker and philosopher from Scotland, born in 1723 and died in 1790, Adam Smith was given this important title because of his ideas and theories on laissez-fair and the tendency of free markets to regulate themselves by way of competition, supply, demand and self-interest. He wrote several books where he proposed his economic ideas, among which we have: The Theory of Moral Sentiments, where he expresses this ideal of a hidden hand, which means the capacity of markets to autoregulate and An Inquiry into the Nature and Causes of the Wealth of Nations. He was also the proponent of the theory of compensating wage differentials, which states that jobs that are riskier pay much better wages to workers because of the risk they represent, versus jobs that offer little to no risk. He is also known as the father of Capitalism.
Answer: His theme was the life of the Virgin and the life of Christ.
I believe the 3 events where, The Lincoln-Douglas Debate, The john brown raid and the Dred Scott Verdict. Browns raid made abolitionist (against slavery) look as if they where the bad guys, Lincoln-Douglas Made each state decide if they wanted to be a slave or no slave state and the Dred Scott made slavery 'legal' anywhere in the U.S.A. Dred Scott was 1857, Lincoln-Douglas was 1858 and John Brown Raid was 1859!