Madhav Gadgil, the pre-eminent ecologist, has just passed away. He was a top-notch academic scientist, a tireless field researcher, a pioneering institution-builder, a great communicator, a firm believer in people’s networks and movements, and friend, philosopher, guide, and mentor to many for over five decades. Trained at the very best universities in modern science, he was at the same time a champion of traditional knowledge systems - especially in biodiversity conservation. His influence on public policy has been profound going back to his crucial role in the Save Silent Valley Movement in the late 70s and early 1980s. His intervention to protect forests in Bastar was crucial in the mid -80s. Later, he gave shape to a new direction to the Botanical Survey of India and the Zoological Survey of India. During 2009-2011, he chaired the Western Ghats Ecology Expert Panel and wrote its report in a most sensitive and democratic manner that remains unmatched in both substance and style. He had studied biology at Harvard under E. O. Wilson, who had been hailed as Darwin’s Heir. Although inspired by Wilson, Madhav Gadgil - unlike most others who went to study abroad - came back to India to build its own research capacities and capabilities, guide students, engage with local communities, and make a difference to policy. In all of these he succeeded more than admirably. Luckily three years back he was able to bring out his delightful memoir, which is at once educative, entertaining, and enlightening. Madhav Gadgil’s life was devoted to scholarship in the noblest sense of the term. He will remain an iconic and inspirational figure. Speaking on a personal note, in the twenty-six months I was Environment Minister during May 2009- July 2011, I turned to him every other day for guidance and advice. And our conversations were not confined to matters related to ecology. We spoke often of his father Dhananjay Gadgil, one of India’s greatest economists and author of that classic The Industrial Evolution of India in Recent Times, first published in 1924. We would also speak of the intricacies of the Indian monsoon, since his wife Sulochana was an authority on the subject. Nation builders come in different forms and varieties. Madhav Gadgil was definitely one of them. Above all he had the hallmark of a true scholar— he was gentle, unassuming, and exuded empathy and humility behind which was a vast ocean of knowledge and learning.