5 Those who deliberately and rashly plan to incite the masses to tumult, sedition, or infringement of the liberty of others are certainly not helping to relieve the poverty of the people but are rather increasing it by fomenting mutual hatred and disturbing the established order; this can even lead to complete chaos. Factional strife "has been and will be to many nations a greater calamity than war itself, than famine or disease."
Source: Optatissima Pax (Vatican.va)