This book ‘Heal-Thy World’, a manifesto for ‘Individual Health’, ‘Social Health’ ‘Healthy India’, ‘Healthy World’ and ‘ONE HEALTH’, contains untold secrets of health care for doctors, health care professionals, policymakers and public health activists. The author has a dream for the world. According to him, health cannot be achieved or maintained in compartments, neither in a body, nor in any single society alone. Social health is becoming a neglected orphan in countries like India, mostly as an outcome of neglected primary health care. Health care is NOT only disease care. Diseases are multiplying disproportionately as compared to population growth, and the lack of proper human development and social security are the key issues that are leading to this unprecedented rise. Healthy individuals in a society reflect proper social security and human development in that society. Lack of prioritization and poor distribution of wealth and human resources are seen everywhere. Promotion of health and wellness and cost effective disease care is optimally possible only with trained family doctors. Medical education should focus on bringing out more of them to help control the spread of disease and to promote health and wellness. Additionally, medical research should focus on the social aspects of health and wellness and not just on drug trials and technology alone. The human species might be extinct if we do not make changes soon. Action plans are needed to build a healthy world, and democratic socialism may be the viable solution. This book also discusses the points needed to design a health policy that will benefit society at large.