sentences:  The relatively few children of the wealthy who joined the military may have reduced their concern about going to war.Milanovic argued that globalization and immigration caused US middle-class wages to stagnate, fueling the rise of populist political candidates.Piketty attributed the victory of Donald Trump in the 2016 presidential election, to "the explosion in economic and geographic inequality in the United States over several decades and the inability of successive governments to deal with this."