This article, which serves to introduce the special issue on "Contesting Coloniality: Rethinking Knowledge Production and Circulation in Comparative and International Education," brings to the fore the rarely acknowledged colonial entanglements of knowledge in the field of comparative and international education (CIE). We begin by showing how colonial logics underpin the scholarship of one of the field's founding figures, Isaac L. Kandel. These logics gained legitimacy through the Cold War geopolitical contexts in which the field was established and have shaped subsequent approaches including the much-debated world-culture approach to globalization in education. The article then reviews decolonial, postcolonial, and southern theory scholarship as an intellectual resource upon which CIE scholars and practitioners can draw to tackle these active colonial legacies. We situate the contribution of this special issue within this larger intellectual movement and call for a major collective rethinking of the way CIE knowledge is produced and circulated on a global scale. A Moment of Deep Reflection We have put together this special issue to initiate dialogue about the active colonial legacies within the field of comparative and international education (CIE), and to show ways of working beyond them. 1 Readers might wonder how CIE, which celebrates and tries to understand the diversity of education around the world, can continue to be influenced by colonial histories and Eurocentrism. In this extended introduction, we explain why coloniality remains a significant challenge to the field and how articles in this collection engage with this challenge. We hope readers will join us in a major rethinking of the norms and knowledge about difference, comparison, and research that have been inherited from the field's history. The authors would like to thank Jun and Minako Yamashita who are at Teachers College, Columbia University, for their generous assistance in accessing Kandel's old writings and Jeremy Rappleye for his kind assistance and encouragement. 1 Our discussion focuses on the English-language CIE, with an acknowledgment that the critiques of the field developed herein might not be applicable to non-English-speaking and non-Western CIE societies around the world.