This book breaks new ground in gender and politics research by studying the multiple ways in which gender and intersectional equalities shape and are shaped by social partners representing employers and employees in Europe, as well as the relationships between those social partners. Little critical attention has been paid to these organizations, yet, as this volume illustrates, social partners are important actors in relation to gender and other inequalities at the level of both individual European countries and the European Union. The chapters in this volume explore the impact of social partners on (in)equalities in a variety of 21^st-century political contexts, taking into account phenomena such as neoliberalisation, austerity, and the COVID-19 crisis. This volume adds a crucial dimension to studies on gender inequalities in the labour market, contributing to research on issues such as domestic work, the gender pay gap, and the persistent undervaluation of women's labour and feminized reproductive labour, in particular care work. It also represents a significant contribution to the literature on gender equality policy. The book's focus on social partners provides important insights that help to explain the persistence of gender inequalities and the difficulties of adopting and implementing policies to combat them. This volume should appeal to students and researchers of gender studies, politics, European politics, employment relations, and international relations, as well as to policymakers engaged in addressing gender inequalities in the labour market.