Answer:
we trade to get better material. we trade for food and merchandise.
In 1644 the Chinese capital at Beijing was captured by the rebel leader Li Zicheng and desperate Ming dynasty officials called Manchus for aid
Slash and burn agriculture is most often practiced in places where open land for farming is not readily available because of dense vegetation
It gave the greek scientists to meditate and become one with what they are studying.
Negotiating international peace treaties
