The group sought a return to the abundant detail, intense colours and complex compositions of Quattrocento Italian art. They rejected what they regarded as the mechanistic approach first adopted by Mannerist artists who succeeded Raphael and Michelangelo. The Brotherhood believed the Classical poses and elegant compositions of Raphael in particular had been a corrupting influence on the academic teaching of art, hence the name "Pre-Raphaelite". In particular, the group objected to the influence of Sir Joshua Reynolds, founder of the English Royal Academy of Arts, whom they called "Sir Sloshua". To the Pre-Raphaelites, according to William Michael Rossetti, "sloshy" meant "anything lax or scamped in the process of painting ... and hence ... any thing or person of a commonplace or conventional kind". The group associated their work with John Ruskin, an English critic whose influences were driven by his religious background. Christian themes were abundant.
The group continued to accept the concepts of history painting and mimesis, imitation of nature, as central to the purpose of art. The Pre-Raphaelites defined themselves as a reform movement, created a distinct name for their form of art, and published a periodical, The Germ, to promote their ideas. The group's debates were recorded in the Pre-Raphaelite Journal. The Brotherhood separated after almost five years.