Feudalism declined during the crusades because

they undermined feudalism, they lost a lot of money in the wars

Explanation:

The fall of the Roman Empire begin in the medieval age. The medieval age brought the plagues, famines, diseases and in the middle of it all is feudalism. Feudalism or the feudal system was a dominant social system used in western mainly from the 5th to 11th century. In feudal system land are rewarded to lower classes for services, military services and loyalty.

if you are talking about current time the answer is no

if you are talking about when the colonies were developing the answer is yes