Keith Sinjohn Joseph (17 January 1918 - 10 December 1994) was a Conservative politician. He served in the Cabinet as Secretary of State for Health and Social Services (1970-74), for Industry (1979-81), and Education (1981-86). He has been described as 'the father of Thatcherism' and is widely regarded as having been highly influential on Thatcher during her time in office.  He became a life peer as Baron Joseph of Portsoken in 1986. 
- Dominic Lawson, 'Keith Joseph may have been odd, but the father of Thatcherism was not uncaring', Independent, 14 July 2006.
- John Biffen, Keith Joseph, guardian.co.uk, 12 December 1994.