44 Again, it is not of itself wrong to prefer a democratic form of government, if only the Catholic doctrine be maintained as to the origin and exercise of power. Of the various forms of government, the Church does not reject any that are fitted to procure the welfare of the subject; she wishes only - and this nature itself requires - that they should be constituted without involving wrong to any one, and especially without violating the rights of the Church.
Source: Libertas (Vatican.va)