Quadragesimo Anno §37

³⁷ Leo's learned treatment and vigorous defense of the natural right to form associations began, furthermore, to find ready application to other associations also and not alone to those of the workers. Hence no small part of the credit must, it seems, be given to this same Encyclical of Leo for the fact that among farmers and others of the middle class most useful associations of this kind are seen flourishing to a notable degree and increasing day by day, as well as other institutions of a similar nature in which spiritual development and economic benefit are happily combined.