Why did Christianity become the state religion in the Roman Empire?

The calculating and far-sighted Constantine found it more profitable to rely on the Christian church to strengthen his personal power than to persecute it, as Diocletian did.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.