Since the end of the Second World War,  middle- and working-class people across the Western world have sought out—and, more often than not, achieved—their aspirations. These usually included a stable income, a home, a family, and the prospect of a comfortable retirement. However, from Sydney to San Francisco, this aspiration is rapidly fading as a result of a changing economy, soaring land costs, and a regulatory regime, all of which combine to make it increasingly difficult for the new generation to achieve a lifestyle like that enjoyed by their parents. This generational gap between aspiration and disappointment could define our demographic, political, and social future. In the United States, about 90 percent of children born in 1940 grew up to experience higher incomes than their parents, according to researchers at the Equality of Opportunity Project. That figure dropped to only 50 percent of those born in the 1980s. The US Census bureau estimates that, even when working full-time, people in their late twenties and early thirties earn $2000 less in real dollars than the same age …