A sample of 661 churchgoers from a range of Christian denominations in the United Kingdom was asked about Darwinian evolution (defined as the common origin of all species, including humans). Respondents were categorised as those who accepted the idea, those who rejected it, and those who were unsure or neutral. People in each category were given a number of statements that related to reasons why they might have held their particular stance, and responses were used to create summated rating scales. Reasons for accepting or rejecting evolution could be classified as broadly relating to the theory itself or to the religious consequences of the theory. Accepters saw the theory as rational and attractive, and one that allowed a role for God in shaping evolution. Rejecters saw the theory as unsupported by evidence and one that denied a role for God and/or contradicted Scripture. Those unsure or neutral seemed to be so because they lacked sufficient knowledge about evolution or the Bible, and/or because they were disinterested. Predicting which reasons were likely to be chosen by an individual was difficult, though there were significance differences in some cases between denominations and between those with or without education in biology or science.