Rodney Crowell has seldom met a life experience he couldn’t get a song out of—particularly in recent decades, when he’s chosen to work outside the boundaries of hit singles and country radio. The songwriter has been on a roll lately, releasing two well-received duet albums with Emmylou Harris, a concept album about his native Texas and even a Christmas album of mostly original songs. He hits a new peak on the current album Triage, whose songs get into existential issues of love, God ...