Answer:
This is important because in a way it is a motto for life, you avoid doing to others something you don't want them to do to you.
International trade enables specialization, which brings increased efficiency and greater competition to spur the market.
This happens because Specialization would make each nation to focus on producing certain type of products in which they would gain a competitive advantage towards other (either because they had the necessary materials sources or labor qualities) and would create better and cheaper product in the market.
Adopted (If I can remember) And then Became Known as Rome's Founders, Who were also Nicknamed as Silver And Gold. I racked my brains for this one btw.
