We are at the beginning of a new era, a lifestyle revolution that will transform who we are and what we do, as people and as consumers. The predictable linear, chronological life pathways of past generations -- from school, to marriage, to work, to children, to retirement -- made sense when the average human life span was shorter. Now, life expectancy has soared to age seventy-seven and promises to rise further, and we are starting to make decisions based less on age and more on lifestyle and life stage. Maddy Dychtwald, a leading expert on generational marketing, offers a radical new view of...