The laissez-faire economic ideology that opposes any governmental regulation or interference in the market beyond a minimum necessary for a free-enterprise to operate according to the laws of the free-market, Darwinism is used by the neo-liberal capitalist theory to justify free competition and the ‘survival of the fittest’ being applied to capitalism.
Liberals and conservatives oppose socialism and social-democracy and the collapse of the Soviet Union has been used as a validation of neo-conservative ideology. The Neo-conservative agenda has been dismantling the compromise between capital and labour and welfare-capitalism, with the capitalist state protecting capitalism from the threat of socialist and social-democratic movements and socialist states.
Keynes saw a need for governments to manage the economy after the Depression of the 1930’s, the Golden Age of welfare-capitalism existed from 1945 up to 1975. This period came to a close with economic stagflation of the mid 1970s. And gave rise to the resurgence of classical laissez-faire economic theory with the Reagan and Thatcher governments in the 1980’s. The global financial crisis of the 21st century has brought a revival of neo-Keynesian economics theories which have been adopted by the Obama and Brown governments to rescue international finance capitalism from collapse.