Biblical criticism is the use of critical analysis to understand and explain the Bible. During the eighteenth century, when it began as "historical-biblical criticism," it was based on two distinguishing characteristics: (1) the concern to avoid dogma and bias by applying a neutral, non-sectarian, reason-based judgment to the study of the Bible, and (2) the belief that the reconstruction of the historical events behind the texts, as well as the history of how the texts themselves developed, would lead to a correct understanding of the Bible. This set it apart from earlier, pre-critical methods; from the anti-critical methods of those who oppose criticism-based study; from later post-critical orientation, and from the many different types of criticism which biblical criticism transformed into in the late twentieth and early twenty-first centuries.