The Integrative Anthropological Sciences (IAS) unit is internationally recognized as a center of excellence in ecological anthropology, human behavioral ecology, evolutionary psychology, primatology, and human biology. Its flourishing community of faculty, graduate students, and post-doctoral fellows join ecological and evolutionary perspectives to frame and test hypotheses about diverse aspects of human nature and culture. The challenges of the 21st century require scholarship that is solidly grounded in both the natural and the social sciences. Thus, IAS's overarching vision is to return anthropology to the forefront of the human sciences by integrating knowledge and methods not only from different branches of modern anthropology, but equally from other scientific fields including ecology, evolutionary biology, economics, sociology, cognitive science, developmental biology, immunology, game theory, psychology, neuroscience, demography, bioinformatics, and political science. To remain relevant, anthropology must not only embrace the scientific advances in collateral disciplines, it must contribute to them. Moreover, IAS members reject an artificial division between 'sociocultural and biological approaches because many phenomena of interest to anthropologists (e.g., ecology, demography, medical anthropology, cognitive anthropology, biomedicine, nutrition) are the outcome of both cultural and biological processes. For similar reasons, methodological pluralism (e.g., ethnography, experiments, behavioral observation, surveys, GIS) will be necessary to tackle this century's complex problems.