Based upon a national longitudinal dataset of 14,527 college students generated by the UCLA Spirituality in Higher Education Project, this study used structural equation modeling to test the applicability of a model of ecumenical worldview development for students of diverse genders, races, and worldviews. The model suggests that challenging co-curricular experiences and the salience of religion and spirituality in academic encounters tend to provoke religious/spiritual struggles, which in turn enhance ecumenical worldview. However, tests for model invariance revealed group differences in the applicability of the model. Differences by gender and race/ethnicity are minimal in comparison to differences by worldview.Keywords College student development Á Ecumenical worldview Á Pluralism Á Spirituality Developing in college students the capacity to live in and contribute effectively to a pluralistic society is one of the essential educational aims of higher education institutions. To be sure, theoretical conceptions of college student development in the last several decades have consistently included openness to diverse others as a dimension of central importance Whitt et al. 2001). The urgency to foster pluralistic competence in college students stems in large part from the increasingly pluralistic realities that young adults discover in the world around them. High school and college students of this generation encounter worldview differences that challenge their own cultural and religious preconceptions to a far greater degree than the generations that preceded them (Wuthnow 2007). Consequently, the manner in which young adults respond