This article studies the development of twentieth century translation theory. This was a period during which significant theoretical contributions were made in both secular and Bible translation circles. These contributions have had a profound impact on the practice of translation throughout the twentieth century and since. The individuals who contributed to the present state of translation theory worked in both secular and Bible translation circles and this article examines contributions from both. A select history of theoretical developments, focusing on the most important ideas relevant to Bible translation work is given in order to examine the impact of such theories in the practice of Bible translation. These include the philosophical approaches of the early twentieth century; the linguistic era of the 1950s and 1960s; the rise of functionalism and descriptive translation studies; and, finally, the emergence of postcolonial and related foreignising approaches.