Paleolithic age . crude stone tools
And more points
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Why is the practice of saying hurtful on true things about the other candidate in an election called “mudslinging”?

The congress shall have power to lay and collect taxes, duties, imposts and excises, to pay the debts and provide for the common defence and general welfare of the united states . .; to borrow money on the credit of the united states; to regulate commerce with foreign nations, and among the several states, and with the indian tribes. —constitution of the united states, article i, section 8 which of these are expressed powers granted by this part of article i, section 8? check all that apply. lay and collect taxes and duties pay debts regulate american indian groups regulate commerce within states borrow money regulate commerce with foreign nations

How does the concept of competition relate to the arms race between the us and the soviet union during the cold war?