But there is another form of poverty! It is the spiritual poverty of our time, which afflicts the so-called richer countries particularly seriously. It is what my much-loved predecessor, Benedict XVI, called the "tyranny of relativism", which makes everyone his own criterion and endangers the coexistence of peoples...Francis of Assisi tells us we should work to build peace. But there is no true peace without truth! There cannot be true peace if everyone is his own criterion, if everyone can always claim exclusively his own rights, without at the same time caring for the good of others, of everyone, on the basis of the nature that unites every human being on this earth.