Data is often considered the domain of scientists and statisticians, but its increasing dominance across nearly all aspects of life – from political and advertising campaigns to social media, dating, education, and public health — has social, political, and ethical consequences, presenting both new possibilities and new hazards. In this course we think critically about how collecting, aggregating, and analyzing data affects individual and social life, with a focus on the ways in which it reproduces and creates new structural inequalities and power asymmetries.