Which powers were the most powerful in the world by the end of the 15th century?

Spain, England and France
France was the very best then.
Early 15th century Byzantium.
In the Far East, China remained the main force, which reached the pinnacle of its power.



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.