Who wrote the phrase,"i think, therefore i am"? in what work did the phrase appear?

Why does reagan claim the united states needs a strong defense policy?

What city of ancient russia was heavily influenced by the byzantine merchants?

Which action by the us war department angered chief red cloud to the point that he refused to sign the treaty of fort laramie ? a) the killing of buffalo by the united states troops b) the appointment of troops to the powder river basin c) the burning of parts of the powder river basin d) the murder of chief red cloud’s wife