This special issue is the second in a two‐part series on the evolution of labour market and disposable income inequalities over recent decades in 17 high‐income countries in Europe and North America. In this Introduction, we provide additional background for the cross‐country project, which has been conducted in parallel to the wider IFS Deaton Review of Inequalities. We briefly summarise the key trends and findings of the papers that cover five Western European countries and four Southern European countries, and a companion paper on the role of education and intergenerational mobility across all 17 countries.