Matthew White Ridley, 5th Viscount Ridley (born 7 February 1958) is a British journalist and businessman.
Ridley is best known for his writings on science, the environment, and economics.
He has written several science books including The Red Queen: Sex and the Evolution of Human Nature (1994), Genome (1999), The Rational Optimist: How Prosperity Evolves (2010) and The Evolution of Everything: How Ideas Emerge (2015).
He publishes a blog, and has been a regular contributor to The Times newspaper.
Ridley is a libertarian, and a staunch supporter of Brexit.
Since 2013, he has been a Conservative hereditary peer, with a seat in the House of Lords.Ridley was chairman of the UK bank Northern Rock from 2004 to 2007, during which period Northern Rock experienced the first run on a British bank in 150 years.
Ridley resigned and the bank was bailed out by the UK government leading to the nationalisation of Northern Rock.