Thomas Merton was a pioneer for a kind of spiritual literature that could be termed as popular theology. He represents a strict form of monasticism, open however to dialog with contemporary culture and with other denominations and religions. The significance of such figures is still not fully appreciated by those who adopt an all-too narrow concept of scientific theology. An author like the convert Thomas Merton is able to stimulate genuine reflection and it is notable that his work stems from his experience “on the fringe” – at the periphery of society and other religions, and even of monasticism itself. The articles of this volume offer a variety of approaches to the spiritual and theological legacy of Merton’s life and work.