Edited sentence: But he refuted as false the theories of Marxist socialists and defended private ownership.He set out principles that should be used in seeking justice in industrial, social, and economic life.He taught that solutions would come from the combined actions of the Church, the State, the employer and the employee.Leo began by describing many of the grievances of the working class.While individual positions or statements have been debated, the work was remarkable as a summary of many issues raised by the industrial revolution and modern democratic societies