a slogan refering to globalization popularised by Margaret Thatcher; means that the market economy is the only system that works, and that debate about this is over
The 80s were the period when capitalist realism was fought for and established, when Margaret Thatcher's doctine that 'there is no alternative'--as succinct a slogan of capitalist realism as you could hope for--became a brutally self-fulfilling prophecy.