 However, Gnosticism was harshly rejected by Christians and c. 180 Irenaeus wrote against them at length in his "On the Detection and Overthrow of the So-Called Gnosis", generally called "Against Heresies".By the third century non-Christian Indians were also considered heretics by the Christians who condemned their practices.Elaine Pagels has encouraged research into the impact of Buddhism on Gnosticism, but she holds that although intriguing, the evidence of any influence is inconclusive.