The French-Indian was extremely costly. It left Britain with a huge debt. The British thought the colonists were to pay the debt because they were defending the colonies from the French. Britain also maintained a standing army in American colonies which was a huge financial stress. As a result, Great Britain taxed the colonies.
They were both concerned about Russia because it was a large and influential country
Within the Jacksonian era almost all white male adult citizens had suffrage. Jacksonian democracy promoted the big strength of the presidency along with the executive branch but this was at the expense of congress. Jacksonian also seemed to broaden the publics participation with the government.
The three most important economists were Adam Smith, Karl Marx, and John Maynard.