Mainstream Christianity has typically rejected the ideas of the New Age; Christian critiques often emphasise that the New Age places the human individual before God. Most published criticism of the New Age has been produced by Christians, particularly those on the religion's fundamentalist wing. In the United States, the New Age became a major concern of evangelical Christian groups in the 1980s, an attitude that influenced British evangelical groups. During that decade, evangelical writers such as Constance Cumbey, Dave Hunt, Gary North, and Douglas Groothuis published books criticising the New Age; a number propagated conspiracy theories regarding its origin and purpose. The most successful such publication was Frank E. Peretti's 1986 novel "This Present Darkness", which sold over a million copies; it depicted the New Age as being in league with feminism and secular education as part of a conspiracy to overthrow Christianity.