How can a difference in ideas between people cause a major conflict? Explain

Because a ideas might be opposite or oppose one another

Explanation:

Like the american civil war. Where the north fought the south to free the slaves. The north does not like slavery while the south likes slavery.

the use of email to replace slower surface mail.

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.