What is socialism? Does it have a future, or has it become an outdated ideology in the 21st century? Michael Newman examines and explains the successes and failures of modern socialism by taking an international perspective -- ranging from communism in Cuba to social democracy in Sweden. Discussing its evolution from the industrial towns of the 19th century to its response to the feminist, green, and anti-capitalist movements today, Newman concludes that, with its values of equality, solidarity, and cooperation, socialism remains as relevant as ever but that it needs to learn lessons from the past.