How did the crusades help lead to the creation of modern europes nation states?

the crusades had a major impact on Europeans. goods began to flow more steadily between Europe and the muslin lands. this trade benefited European kings. who taxed the goods that crossed their border. kings also took over land from nobles who left to fight in the crusades. as a result. feudalism gradually withered. and Europe's kingdoms through stronger and larger. many of them later became modern Europe's nation-states.