Thomas Merton, Donald Nicholl, and Henri Nouwen, twentieth-century spiritual writers and thinkers, were, for significant chunks of time, contemporaries. To some degree they spoke out of similar contexts. To some degree they addressed similar crises.
Higgins, Michael W. "Henri Nouwen, Thomas Merton, and Donald Nicholl: Pilgrims of Wisdom and Peace." Turning the Wheel: Henri Nouwen and Our Search for God. Eds. J. Bengtson and G. Earnshaw. Maryknoll: Orbis Books, 2007.