SANTA CRUZ, Bolivia—On Dec. 19, 35-year-old socialist Gabriel Boric became the youngest president in Chile’s history after defeating right-wing candidate Jose Antonio Kast. Boric won with 55.87 percent of the votes in a run-off election after the Nov. 21 general poll. The Santiago stock exchange plummeted more than six points after Boric was announced the winner, while the US dollar hit a historic maximum in exchange at 872.61 pesos. It was a tight election race between Kast and Boric and was also the nation’s most polarized since the end of the Pinochet dictatorship back in 1990. Boric, a former student union leader who got his start in politics during the 2011 civil protests, studied law at the University of Chile but never finished, which has been heavily criticized by his contenders. The millennial president is one of only seven to enter the presidential palace of La Moneda without completing a university education. Kast conceded defeat on Dec. 19 and congratulated Boric in a public statement. …