Barker, P. (Ed.)
The founders of the welfare state
Heinemann, London, 1984
Although this is a 25 years old publication, it is still a very useful and concise overview of a selected group of people who paved the way for the welfare state.
One could wonder whether a similar more recent overview could be made for the persons who have since tried to transform/diminish that same welfare state and what their alternatives are.