Fratelli Tutti §258

²⁵⁸ War can easily be chosen by invoking all sorts of allegedly humanitarian, defensive or precautionary excuses, and even resorting to the manipulation of information. In recent decades, every single war has been ostensibly “justified”. The Catechism of the Catholic Church speaks of the possibility of legitimate defence by means of military force, which involves demonstrating that certain “rigorous conditions of moral legitimacy” have been met. Yet it is easy to fall into an overly broad interpretation of this potential right. In this way, some would also wrongly justify even “preventive” attacks or acts of war that can hardly avoid entailing “evils and disorders graver than the evil to be eliminated”. At issue is whether the development of nuclear, chemical and biological weapons, and the enormous and growing possibilities offered by new technologies, have granted war an uncontrollable destructive power over great numbers of innocent civilians. The truth is that “never has humanity had such power over itself, yet nothing ensures that it will be used wisely”. We can no longer think of war as a solution, because its risks will probably always be greater than its supposed benefits. In view of this, it is very difficult nowadays to invoke the rational criteria elaborated in earlier centuries to speak of the possibility of a “just war”. Never again war!