In 1906 John A. Ryan published an influential book A Living Wage,  based on economic and moral argument of minimum wage legislation. He believed that in the consumer economy it’s a “natural and absolute” right of citizenship to making a standard living wage. John A. Ryan also criticized the inequality of the wealth and power in the Progressive America. The lower class is being taking advantages of whereas the upper class were controling the economy wealth. Based on his political thoughts in moral theology; he translated the Rerum Novarum of Pope Leo XIII in 1894 in English stated that the  endorement of  the right to labor union is necessary.