Critics have said that Osvaldo Golijov may be the first significant classical music composer to define the sound of the 21st century. It’s part of the reason why he was named a MacArthur fellow in 2003. Jeff Lunden spoke with Golijov about his love for the early-Baroque music of Monteverdi, as part of a series curated by WNYC’s Sara Fishko on living musicians and their relationship to the past.