Should countries involve themselves in other countries' affairs for humanitarian reasons?

Do you agree with Bill Gates that these 3 beliefs are only myths? (Gates Annual Letter)

H.R.2548 - Electrify Africa Act of 2014

Was the U.S. involvement in Nigerian hostage situation (Chibok schoolgirls kidnapping) good or bad?

Hillary Clinton or Donald Trump - who do you trust more on foreign policy?

Should the U.S. suspend immigration for Iranians?

H.R.3744 - Venezuelan Refugee Assistance Act

Would you like the United States to protect your country in any way, if there was any potential danger?