As an example of efforts in recent times, the German philosopher Martin Heidegger (1889-1976) (who himself drew on ancient Greek sources) adopted German terms like "Dasein" to articulate the topic. Several modern approaches build on such continental European exemplars as Heidegger and apply metaphysical results to the understanding of human psychology and the human condition generally (notably in the existentialist tradition). By contrast, in mainstream analytical philosophy the topic is more confined to abstract investigation, in the work of such influential theorists as W. V. O. Quine (1908-2000), to name one of many. One of the most fundamental questions that has been contemplated in various cultures and traditions (e.g., Native American) and continues to exercise philosophers was articulated thus by William James (1842-1910) in 1909: "How comes the world to be here at all instead of the nonentity which might be imagined in its place? ... from nothing to being there is no logical bridge."