This book, originally published in 1978, constitutes a genuinely comparative study of the world's only truly succesful democratic socialist parties: the Social Democraic Parties of Denmark, Norway and Sweden. The measure of achievement is not merely political success, the fact that in Scandinavia the Social Democrats have become 'natural parties of goverment', for just as importantly, the author shows that a political success grounded on the symbiotic relationship between party and trade union movement has been the foundation for a higher level of welfare state provision and egalitarian striving than in virtually any other advanced Western nations. It is a book for friends and foes of democratic socialism alike; for the former to provide an understanding of the tasks ahead and for the latter to know the enemy better.