For many decades, there has been a debate about the relation between corporate social/environmental performance (CSP) and corporate financial performance (CFP). Our study presents a review of academic research on this topic by applying a second-order meta-analysis. The data sample combines 25 previous meta-analyses yielding a sample size of one million observations. Our results demonstrate a highly significant, positive, robust, and bilateral CSP-CFP relation. The relation is positive regardless of whether firms focus on ecological or social aspects, though corporate reputation turns out to be a key CSP determinant. We find a particularly strong CSP-CFP relation for operational CFP. Furthermore, we add a new perspective on potential biases resulting from the studies' publishing source: social issues-oriented journals and methodological weaker papers do not distort the positive CSP-CFP relation. Our conclusion is: Based on the extant literature, the business case for being a good firm is undeniable. found a significant, positive, and bidirectional correlation of CSP with CFP. Despite these findings, the authors claim that this relation cannot be generalized across all CSP dimensions and CFP categories, detecting a large variabilityeven after correcting for sampling error and measurement error. Since then, the picture has become even more ambiguous and critical debates have resurfaced about the actual CSP-CFP relation (one hand, many scholars claim that, to date, the literature on the CSP-CFP relation remains inconclusive. On the other hand, a whole range of new studies and further meta-analyses have been published supporting a positive relation. Thus, more than a decade after Orlitzky et al. (2003), it seems to be the right time to revive the paper's spirit and ask: when generalizing existing research, is there still evidence that it pays off to be a good firm?To answer this question, we apply a second-order meta-analysis. In other scientific disciplines like medicine, psychology, or education (i.e. research areas typically also experiencing vast amounts of data and conflicting results), meta-analytic techniques are widespread and have been applied since the 1960s (Glass, 1976;Hedges & Olkin, 1985;Hunter, Schmidt, & Jackson, 1982). With the growing number of meta-analyses, the idea of cumulative meta-analysis also appeared (Kazrin, Durac, & Agteros, 1979). Several labels have been used for such analyses: overview of reviews, review of reviews, umbrella reviews, meta-reviews, cumulative meta-analyses, meta-meta-analysis, and second-order meta-analysis (Cooper & Koenka, 2012). However, until recently, no standard procedure with comparable rigour to first-order meta-analytical approaches had emerged. This paper makes use of the novel method for conducting second-order meta-analysis proposed by Schmidt and Oh (2013).We contribute to the academic inquiry on the CSP-CFP relation in several regards. By summarizing the findings of existing meta-analyses and utilizing a data sample that is more than 25 times larger compare...