They used this phrase because the Brits taxed the colonists for the silliest things and didn't ask for consent by the Colonists. On top of that, the Brits would not allow a colony representative to discuss the matters with them at Parliament. Hope this helps!
Hugo grotius was a 16th century scholar who was pretty critical to international law. whenever you research the question he’s the one who pops up everywhere.
A- Mexico wanted the industries brought by the immigrants.
Europeans were the first to make guns & this is why not only they conquered African countries but also most of South America.