This book is about the degree to which people take pleasure in life: in short 'happiness'. It tries to identify conditions that favor a positive appreciation of life. Thus it hopes to shed more light on a longstanding and intriguing ques tion and, possibly, to guide attempts to improve the human lot. During the preceding decades a growing number of investigations have dealt with this issue. As a result there is now a sizable body of data. Yet it is quite difficult to make sense of it. There is a muddle of theories, concepts and indicators, and many of the findings seem to be contradictory. This book attempts to bring some order into the field. The study draws on an inventory of empirical investigations which involved valid indicators of happiness; 245 studies are involved, which together yield some 4000 observations: for the main part correlational ones. These results are presented in full detail in the simultaneously published 'Databook of Happiness' (Veenhoven 1984). The present volume distils conclusions from that wealth of data. It tries to assess the reality value of the findings and the degree to which correlations reflect the conditions of happiness rather than the consequences of it. It then attempts to place the scattered findings in context. As such, this work is not a typical study of literature on happiness.

A new perspective on life satisfaction and well-being over the life course What makes people happy? The Origins of Happiness seeks to revolutionize how we think about human priorities and to promote public policy changes that are based on what really matters to people. Drawing on a range of evidence using large-scale data from various countries, the authors consider the key factors that affect human well-being, including income, education, employment, family conflict, health, childcare, and crime. The Origins of Happiness offers a groundbreaking new vision for how we might become more healthy, happy, and whole.

Now in paperback, evolutionary biologist and science writer Alanna Collen’s stunning alarm call concerning the widely-ignored role our gut microbes play in our health and well-being. “Fascinating…. Everything you wanted to know about microbes but were afraid to ask.”— Kirkus Reviews (starred review) You are just 10% human. For every one of the cells that make up the vessel that you call your body, there are nine impostor cells hitching a ride. You are not just flesh and blood, muscle and bone, brain and skin, but also bacteria and fungi. Over your lifetime, you will carry the equivalent weight of five African elephants in microbes. You are not an individual but a colony. Until recently, we had thought our microbes hardly mattered, but science is revealing a different story, one in which microbes run our bodies and becoming a healthy human is impossible without them. In this riveting, shocking, and beautifully written book, biologist Alanna Collen draws on the latest scientific research to show how our personal colony of microbes influences our weight, our immune system, our mental health, and even our choice of partner. She argues that so many of our modern diseases—obesity, autism, mental illness, digestive disorders, allergies, autoimmunity afflictions, and even cancer—have their root in our failure to cherish our most fundamental and enduring relationship: that with our personal colony of microbes. The good news is that unlike our human cells, we can change our microbes for the better. Collen’s book is a revelatory and indispensable guide. Life—and your body—will never seem the same again.