The outstanding moral problem of our time is the emergence of an underclass, provoking both pity and an angry political backlash. Robin Marris finds that a slowdown in growth is the root cause, leading to a collapse of the labour market for unskilled men in particular. Fashionable solutions such as lower wages or welfare reform benefit those already well-off, and exacerbate growing income inequality. He employs statistical, sociological and psychological...