This study aims to understand the pro-environmental attitude of Kallen Pokkudan, one of the major environment conservationists of Kerala, India, known as a “Protector of mangroves”. His approach to nature not only inspires sustainable development activities but also underlines the importance of cultural heritage. Coming from a Dalit family, Pokkudan's early life was tense with socio-economic hardships that limited his access to formal education. Despite these challenges, Pokkudan developed a deep connection with nature, especially the mangrove ecosystem near his village. He succeeded in bringing the concepts of sustainable development and biodiversity conservation to the level of the layman which was the main goal of his life. He continues to inspire uswhilehighlighting the importance of the common man in biodiversity conservation and sustainable development, and we can understand that his dedication to this cause stems from his deeply innate pro-environmental attitude.This study also discusses the impact of living conditions in coastal areas on his environmental conservation perspective, which subsequently influenced nature conservation methods and the development of resilience within coastal communities.This study aims to highlight the transformative power of individual and community-led activism in promoting environmental sustainability. By examining the enduring cultural legacy of Kallen Pokkudan, a common man, this study seeks to inspire environmental activists and policymakers to adopt similar approaches in the future generations in conserving biodiversity and fostering sustainable livelihoods around us.