This book provides a quantitative, cross-nationally comparative, longitudinal, and multilevel study of the drivers and spoilers of national governments’ anti-trafficking measures. Both macro-level determinants of anti-trafficking enforcement and micro-level foundations of human trafficking are unfolded and explored. Large-N comparative research examines how characteristics of countries interact with people’s attitudes towards violence to better understand what creates environments that are more or less supportive of governments’ anti-trafficking efforts. The results presented in the book are highly relevant from the perspectives of global governance and human rights protection.