Matthew White Ridley, 5th Viscount Ridley DL FRSL FMedSci (born 7 February 1958), commonly known as Matt Ridley, 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 is a regular contributor to "The Times" newspaper.