In this commentary, we aim to make a case for the explicit inclusion of combinatorial topics in the curriculum -both in K-12 classrooms and in introductory postsecondary mathematics courses -where it is currently essentially absent. To do so, we suggest ways in which researchers might inform the field's understanding of combinatorics and its potential role in curricula. We reflect on five decades of research that has been conducted since a call by Kapur (1970) for a greater focus on combinatorics in mathematics curricula. We offer five assertions about combinatorics, including three existing assertions and two new assertions that relate to increasingly relevant trends in mathematics education. Specifically, we discuss the following in making our case for combinatorics: 1) Combinatorics is accessible, 2) Combinatorics problems provide opportunities for rich mathematical thinking, 3) Combinatorics fosters desirable mathematical practices, 4) Combinatorics can contribute positively to issues of equity in mathematics education, and 5) Combinatorics is a natural domain in which to examine (and develop) computational thinking and activity. As we discuss each of these ideas, we summarize and synthesize existing research and offer new ideas for research. Ultimately, we hope to make a case for the valuable and unique ways in which combinatorics might effectively be leveraged within K-16 curricula, and we hope to elevate its status in the mathematics education research community.