The Diktatorship of Relativism

Pope Francis used the term "dictatorship of relativism" in a homily at John Paul II's funeral. He said that reason attempting to live without faith is headed toward what? What? The intellect is useless and all that's left is the will, he says. And I think this is especially important right now in the United States because we've kind of disbared of constructing our society according to what is true about the human person.