Turn to his Utopia of the City of the Sun, in which all are educated in common. All the Solarians call each other brother; they are all sons of the great Father adored on the summit of the mountain on which the city is built. There is not, and cannot be, among them any selfishness. All consider the common good, and, under the guidance of the priest and head, live happily together; since all are instructed, and knowledge is the foundation of every honour, there is a noble strife of intelligence. The Solarian citizens have made wonderful progress in the arts and sciences. They have ships that plough the seas without sails and without oars; and cars that are propelled by the force of the wind; they have discovered how to fly, and they are inventing instruments which will reveal new stars. They know that the world is a great animal in whose body we live, that the sea is produced by the sweat of the earth, and that all the stars move. They practise perpetual adoration, offer up bloodless sacrifices, and reverence, but do not worship, the sun and the stars. All this simplicity, happiness, and prosperity are due in the first place to education and to communism, and in the second place to the magistrates who are all priests. The spiritual and temporal head is Hoch, who is assisted by Pom, Sim, and Mor. Pom has charge of all that refers to war; Sim presides over the arts, industries, and instruction; Mor directs human generation and the education of children; he regulates the sexual relationships in order to produce healthy and robust offspring, only permitting the strong to procreate; the rest are allowed to sacrifice to the terrestrial Venus after fecundation has been ascertained. The City of the Sun is not in favour of war, but does not refuse to fight; in battle her citizens are invincible, because they fight in defence of their country, natural law, justice, and religion.