The No Turning Back group of Conservative MPs, often referred to as Margaret Thatcher's "Praetorian Guard," emerged in 1985 to renew the intellectual force behind Thatcherism when critics claimed the government was losing direction. Their ideas and policies not only influenced the final years of the Thatcher era but also left a lasting mark on successive Conservative and Labour governments. This concise primer explores the group's origins, its motivations, and the enduring power of their ideas in shaping modern British politics.