Efforts to promote gender equality have recognized the importance of involving men and boys. Yet, in general, we have done little in terms of large-scale research in the Global South to understand how men are responding to the global gender equality agenda. This article presents findings from the International Men and Gender Equality Survey (IMAGES), one of the most comprehensive efforts of its kind to gather data on men's attitudes and practices related to gender equality in eight low-and middle-income countries: Brazil, Chile, Mexico, India, Bosnia and Herzegovina, Croatia, Democratic Republic of Congo, and Rwanda. It provides a current picture of men's attitudes about gender and gender equality, explores the determinants of equitable attitudes, and investigates the associations between equitable attitudes and relationship behaviors. We find that men report positive but ambivalent attitudes toward gender equality, and that education, income, and more equitable practices in men's childhood homes are associated with men's more equitable attitudes and Downloaded from practices. Finally, we show that in most countries, men's equitable attitudes are also associated with more equitable practices, including more participation in the home and reduced use of violence, as well as higher sexual satisfaction. The findings suggest both the need for program approaches that change attitudes, as well as policy and structural approaches that create lived experiences of gender equality for men. Given how much early childhood experiences influenced men's adult attitudes and practices, the findings also emphasize the need for programs and policies to promote equitable caregiving.