International Futures (IFs) is a global integrated assessment model designed to help with thinking strategically and systematically about key global systems (economic, demographic, education, health, environment, technology, domestic governance, infrastructure, agriculture, energy and environment). It is housed at the Frederick S. Pardee Center for International Futures. Initially created by Barry B. Hughes of the Josef Korbel School of International Studies at the University of Denver in Colorado, the model is free for public use in both its online and downloadable forms.