I know exactly what it is. I also know that it has not been the official Catholic teaching on economics - ever. Rerum Novarum espoused certain thoughts on economics which some people (mostly non-Catholic socialists) twisted into distributism. Distributism is never advocated in that encyclical.
Many popes have decried the damage of socialism and the excesses of capitalism, but no pope has advocated for a specific alternative. In fact, Saint PJPII in Centissimus Annus (the 100 year anniversary of Reum Novarum) decidedly shifted the Catholic thought toward capitalism.
Thank you for that link, made my day.