Trade is vital characteristic that separates the [[human]] species from the [[animal]] world. [[Human being]]s are dependent upon other human beings for their survival. Very few, if any, human beings provide their own need for [[food]], housing, and clothing without trading with other human beings. | Trade is vital characteristic that separates the [[human]] species from the [[animal]] world. [[Human being]]s are dependent upon other human beings for their survival. Very few, if any, human beings provide their own need for [[food]], housing, and clothing without trading with other human beings. |