Dans ce livre influent, Frédéric Le Play examine les systèmes sociaux de différents pays européens et tente de déduire les principes qui pourraient être appliqués à la réforme sociale en France. Il offre des insights remarquables sur les questions de sécurité sociale et de politique économique, et son influence sur les penseurs et les politiciens qui ont suivi a été considérable.

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