Karl is professor of Environment and Society Geography, directs the GeoSyntheSES Lab, and is cross-appointed in the Department of Rural Sociology and the Intercollege Graduate Degree Program in Ecology. He co-leads the Urban-Rural Linkages and Food Biodiversity Workshop at SESYNC. Karl’s current research and teaching are focused on the transformative resilience and sustainability of land use and food systems and the support of marginalized social groups and food biodiversity. He uses agrobiodiversity models, spatial landscape designs, and cultural, socioeconomic, and historical analysis. At present, Karl is researching the sustainability and social justice issues of smallholders and food biodiversity amid intersectional global and local environmental, social, and economic changes (climate change, urbanization, globalization), landscape analysis of networks, and local and indigenous territorial initiatives. He has authored over 110 articles that appear in Ecology and Society (2014, 2018), Nature and Nature Plants (1995, 2017), ReVista: Harvard Review of Latin America (2016, 2017, 2018), Annals of the AAG (1991, 1994, 2000, 2010, 2011, 2017), Proceedings of the NAS (2013), Landscape & Urban Planning (2015), and Environmental Sustainability (2015, 2018). Karl’s 7 books include Agrobiodiversity: Integrating Knowledge for a Sustainable Future, Changing Fortunes: Biodiversity and Peasant Livelihoods in the Peruvian Andes, Globalization and New Geographies of Conservation, and Political Ecology. Karl is the current and past recipient of research grants and fellowships from NSF (3 programs), Fulbright, Harvard, Yale, and the Rockefeller and Guggenheim Foundations, among others. Karl and his research have received the recognition of elected AAAS fellow, Penn State’s Medal for Outstanding Research in the Social Sciences, and awards from the American Association of Geographers and the American Geographical Society.