People have various hobbies. They collect stamps, coins, engage in crafts, constructions, sports, reading, and more.

Among those who read, some read newspapers, others literature, poetry, astronomy, zoology, botany, history, inventions. Others are interested in television or the internet.

And, of course, it is not logical for some to accuse others. Normal people reconcile with the idea that what interests them is not necessarily of interest to everyone else.

The question, of course, is: Are there things that should interest all people without exception? Freedom, love, romance, art, democracy, justice, humanity, improvement of living conditions, sustainability, environmental protection, are concepts that interest - or at least should interest - all people. And on a philosophical level, the effort to answer questions such as where we came from, what is our destination, what is good and what is bad.

In the very old days, people resolved their differences through violence. But when civilization gained ground, they turned to a referee, the leader or elder of the tribe. Then laws and courts were established. Today, with the complexity of societies, Justice, in order to properly perform its work, seeks support and Science.

In Mathematics, Justice finds an effective assistant and an external good testimony.