The Last Judgment God, in his infinite love, created the world and found it very good. He created man and woman in his image and likeness (Gn 1:27). Nowadays, the world is globalized and has serious challenges: hunger, poverty, climate, water scarcity, food production ... In a capitalistic economic system, which aims at money and profit. Therefore, many times the poor, the ill and migrants are excluded and marginalized. Jesus' teaching, in the Last Judgment, in Matthew 25:31-46, leads us to question life and demands us a concrete action in defense of life. For it was Jesus himself who said: "I assure you, as often as you did it for one of my least brothers, you did it for me" (Mt 25:40). In this book, we're going to address the text in its context, make a complete exegesis and renovate the beautiful message of Jesus. This book is intended for all people who dream and strive for a better world, who practice acts of mercy to the least here and now and know that this will be decisive in the conquest of eternity.