This book discusses the association between ecological and social determinants and suicidal behavior. Suicidal behavior is an extremely complex human behavior. It is an outcome of complex interactions among multiple factors like gene and environment, biopsychosocial, proximal and distal factors. Several risk factors such as psychiatric disorders, life events, social deprivation, personality traits and disorders, and substance abuse have been identified even though those vary based on culture, time, country, and methods of assessment. In recent times, evidence has shown associations among ecological variables like the human development index, the income of the country, the GINI index, educational attainment, the green environment, climate change, and suicidal behavior. At the same time, there are interlinked confounding variables that challenge the findings. Given the lack of literature discussing these findings, this book seeks to compare and contrast the ecological aspects and suicidal behavior holistically.