Alexandros Efstratiou is incoming Postdoctoral Fellow at the University of Washington’s Center for an Informed Public. Previously, he undertook a PhD in Computational Social Science at University College London. He studies why misinformation proliferates online, and why trends of polarization are continually rising. His research shows that polarization can create a fertile environment for misinformation to proliferate, and examines the effects of social media on informational environment health.His work employs computational social science methods to understand and intervene in these online harms.