Timothy J. Killeen is a conservation scientist with broad expertise in botany, forest ecology and natural resource economics. His early research focused on documenting biodiversity and understanding its distribution across landscapes and regions. Expertise in remote sensing technology led him to document deforestation and to model carbon emissions linked to development. Tim has advised both private and public stakeholders on sustainability issues linked to the production of palm oil, soy, beef and coffee, as well as participated in environmental evaluations of infrastructure projects including pipelines, highways and hydroelectric facilities. Tim’s perspective on the Amazon is informed by his life experience. A 35-year resident of Bolivia, he has forged friendships with Indigenous and pioneer families, biologists and environmental advocates, as well as with ranchers, soybean farmers, gold miners, petroleum engineers and politicians.