Why/how does trade make people and countries better off?

because another country may have a huge supply of suger and we want that suger so we can trade one of our goods for that suger to make everyone worldwide happy

Explanation:

well first we can compare on what the slave masters ate and what the slaves ate well the masters ate fancy great food like chicken rice mash potatose and stuff like that and slaves ate well food that your not suppost to eat like the weird parts of turkey and chicken and slaves master chilled beat and eat and slaves work get beat and get little of sleep there you go

the answer is they believed george iii would never give them their freedom.