Priestley began writing the
Institutes in the 1760s, when he was a student at
Daventry, one of the
dissenting academies. While there, he had imbibed the pedagogical principles of its founder,
Philip Doddridge; although he was dead, Doddridge's emphasis on academic rigour and freedom of thought lived on at the school and impressed Priestley. The ideals would always be a part of Priestley's educational programs. However, researching and writing the work eventually convinced Priestley to abandon the
Calvinism of his youth and adopt
Socinianism. Priestley did not publish the
Institutes until 1772, when he was at
Leeds. In an effort to increase and stabilise membership at his church there, he taught three religious education classes, all outlined in his text. He subdivided the young people of the congregation into three categories: young men from 18 to 30 to whom he taught "the elements of natural and revealed religion" (young women may or may not be included in this group), children under 14 to whom he taught "the first elements of religious knowledge by way of a short catechism in the plainest and most familiar language possible"; and "an intermediate class" to whom he taught "knowledge of the Scriptures only". Unlike the later
Sunday schools established by
Robert Raikes, Priestley aimed his classes at middle-class Rational Dissenters; he wanted to teach them "the principles of natural religion and the evidences and doctrine of revelation in a regular and systematic course", something that their parents could not provide. Priestley wrote texts for the courses that he envisioned:
A Catechism for Children and Young Persons (1767) went through eleven English-language editions and
A Scripture Catechism, consisting of a Series of Questions, with References to the Scriptures instead of Answers (1772), which went through six British editions by 1817. He aimed to write non-sectarian
Catechisms but failed. He offended many orthodox readers by focusing on God's benevolence instead of on Adam's sin and Christ's atonement. Priestley implemented this same system of religious instruction over a decade later in
Birmingham, when he became a minister at New Meeting. ==Reaction==