The definite article with adjectives

The definite article can be used before an adjective to refer to all the people described by it. If the + adjective is followed by a verb, it will take a plural form:

The rich get rich, and the poor stay poor.
Only the brave are free.

Many adjectives that describe a nationality behave in the same way unless they end in -an:

The English are famous for being very polite.
The French eat a lot of cheese.

But:

Canadians play a lot of hockey.