I shall present a paper I am coauthoring with Yoon Choi (Marquette). In it we argue for a conception of the unity of science that is of distant but distinct Kantian provenance. We first review some of the challenges that undermined two influential predecessor conceptions of the unity of science. Many of these criticisms were raised by pluralists, who found them reason enough to embrace, and not just tolerate, the disunity of science. We propose an alternative response. We argue that the epistemic advantages of pluralism arise only when pluralism is combined with a limiting, unifying constraint: when it is a unified pluralism. But once we adopt unified pluralism, there is, we suggest, a shared ideal that emerges, a conception of what we call the pluralist unity of science.