Cars became popular in 20th century. I think this is the right answer.
To become an ally. To import amd export goods to eachother amd better eachothers economies.
Tinker v. Des Moines.
If I was a Supreme Court justice, I would have ruled in the same manner as they did (in favor of Tinker) because of the 1st amendment. The freedom of speech applies anywhere within the United States of America and its territories. Taking away that right in schools when it isn't even disruptive (they were only wearing black armbands), is against the U.S. Constitution
