"Most quantitative empirical analyses are motivated by the desire to estimate the causal effect
of an independent variable on a dependent variable. Although the randomized experiment is the
most powerful design for this task, in most social science research done outside of psychology,
experimental designs are infeasible. (Winship & Morgan, 1999, p. 659)." This quote from earlier work by Winship and Morgan, which was instrumental in setting the groundwork for their book, captures the essence of our review of Morgan and Winship's book: It is about causality in nonexperimental settings.