The book The Institutionalisation Process of the Welfare State and Analyses by Country Groups examines the historical development of the welfare state and its institutionalisation across different groups of countries. It highlights how the concept of the welfare state gained strength from the 1930s to the 1970s under the influence of Keynesian policies, but then weakened following the collapse of the Bretton Woods system and the oil crises. It analyses the impact of increased public spending, public sector expansion and economic crises on welfare policies.