Reasons for the formation of centralized states in Western Europe

The first states were formed in France, England, Spain. Unlike Russia, the main reasons for the formation of large Western European states were mainly economic.

Strengthening, for various reasons, land holdings, income and power of kings. Which allowed them to maintain a strong army.
Manufacturers appear. The productive forces are growing. Cities are getting stronger. Which leads to the development of foreign trade. All kinds of duties, lack of a single coin and other similar reasons seriously interfere with this.
There is an increase in the exploitation of peasants by the feudal lords. This could lead to a social explosion. Only a powerful, centralized state could prevent it.