The significance of happiness in the realm of national development cannot be underestimated. While economic growth and material progress remain essential markers of a nation’s advancement, the overall happiness and well-being of its citizens play a pivotal role in achieving sustainable development. This research study probes into the complex relationships among a wide spectrum of socio-economic, environmental, and psychological factors, exploring their collective influence on individual and societal happiness within the broader context of sustainable development. Aim of this study is to focus on the level of influence due to different factors such as economic factors like GDP and social factors like corruption levels, generosity, freedom indices, and life expectancy across different parts of the globe. The study will emphasis on the detection of happiness and well-being within the context of sustainable development by applying different multidisciplinary approaches and quantitative techniques. The findings will further uncover that while numerous factors significantly influence happiness and well-being, generosity will emerge as a variable that does not have statistically significant influence on happiness degrees. The findings in this paper will provide valuable guidance for researchers and policymakers who are working for improving overall quality of life for individuals and societies across the world in order to have sustainable development.