At that time, the Second Vatican Council took up most of the Church's attention. Still, the Pope took time to write it. Today, it continues to be a point of reference in understanding the Social Doctrine of the Church, especially in terms of conflict resolution.
In it, Pope John XXIII, explains that the conditions for peace are authentic when based on truth, justice and love.
The five chapters include the rights and responsibilities of people, their relationship with public authorities and public policy. It also focuses on the role of international public authorities.