Major Theoretical Questions Theories about subjective well-being have grown over the past several decades, but have been re ned only slowly as adequate data have been compiled to test them. We can characterize the theories describing happiness along several dimensions. The rst dimension is whether the theory places the locus of happiness in external conditions such as income and status, as many sociological theories do, or within the attitudes and temperament of the individual, as many psychological theories do. Some have maintained that people adapt to all circumstances over time, so that only individual personality matters for producing happiness, whereas others believe that economicandothersocietalfactorsarethedominantforcesinproducingwell-being. Throughout my writings there is a mix of both the internal and external factors that in uence well-being. A second dimension that characterizes scholarship on well-being is the issue of whether the factors affecting well-being are relative or absolute. That is, are there standards used by people at all times and places in judging their lives and in reacting to events? Or are standards dependent on what other people possess, on expec- tions,andonadaptationlevelsbasedonpastcircumstances?Again,thereisevidence supporting the role of both universal and relative standards. People around the globe are probably in uenced by common factors such as friendship versus loneliness, but even these universal in uences on happiness are probably subject to some degree of comparison depending on what the person is used to and what others have. However, some factors might be much more comparative than other in uences, as Hsee, Yang, Li, and Shen (in press) have described.

When a cultural movement that began to take shape in the mid-twentieth century erupted into mainstream American culture in the late 1990s, it brought to the fore the idea that it is as important to improve one's own sense of pleasure as it is to manage depression and anxiety. Cultural historian Daniel Horowitz's research reveals that this change happened in the context of key events. World War II, the Holocaust, post-war prosperity, the rise of counter-culture, the crises of the 1970s, the presidency of Ronald Reagan, and the prime ministerships of Margaret Thatcher and David Cameron provided the important context for the development of the field today known as positive psychology. Happier? provides the first history of the origins, development, and impact of the way Americans -- and now many around the world -- shifted from mental illness to well-being as they pondered the human condition. This change, which came about from the fusing of knowledge drawn from Eastern spiritual traditions, behavioral economics, neuroscience, evolutionary biology, and cognitive psychology, has been led by scholars and academic entrepreneurs, as they wrestled with the implications of political events and forces such as neoliberalism and cultural conservatism, and a public eager for self-improvement. Linking the development of happiness studies and positive psychology with a broad series of social changes, including the emergence of new media and technologies like TED talks, blogs, web sites, and neuroscience, as well as the role of evangelical ministers, Oprah Winfrey's enterprises, and funding from government agencies and private foundations, Horowitz highlights the transfer of specialized knowledge into popular arenas. Along the way he shows how marketing triumphed, transforming academic disciplines and spirituality into saleable products. Ultimately, Happier? illuminates how positive psychology, one of the most influential academic fields of the late twentieth and early twenty-first centuries, infused American culture with captivating promises for a happier society.