3 However, as sincere and thoughtful persons recognize, it is not in this way that either the problems which still separate nations can be solved, or the proletariat classes be guided, as they should, towards a better future. Never, be it said, has hatred or Iying or disorder generated any good. Unquestionably, people who are needy should be raised to a status that is worthy of man; yet not with force, not with violence, but with laws that are just. What must certainly be done, under the auspices of truth and the guidance of justice, is to eliminate as soon as possible all the differences which separate and divide peoples.
Source: Summi Maeroris (Vatican.va)