The only struggle which religions can justify, the only struggle worthy of humans, is the moral struggle against humanity's own disordered passions, against every kind of selfishness, against attempts to oppress others, against every type of hatred and violence.
Pope John Paul IISide by side with the miseries of underdevelopment...we find ourselves up against a form of superdevelopment, equally inadmissable. This superdevelopment consists in an excessive availability of material goods for the benefit of certain social groups and makes people slaves of "possession" and immediate gratification, with no other horizon than the multiplication or continual replacement of the things already owned with others still better. This is the civilization of consumption, or "consumerism," which involves so much throwing away and waste.
Pope John Paul III cannot fail to note once again that the poor constitute the modern challenge, especially for the well-off of our planet, where millions of people live in inhuman conditions and many are literally dying of hunger. It is not possible to announce God the Father to these brothers and sisters without taking on the responsibility of building a more just society in the name of Christ.
Pope John Paul II