When the Constitution was first ratified, what was seen as the greatest threat to individual freedoms?

Factions.

Explanation:

After constitution was first ratified, several factions exist in United States in order to fight over control within the government.

Factions generally independent groups that tried to accumulate as much support from the government as possible in order to establish control upon the type of legislations that should be passed by the government.

Former President James Madison stated that he's scared that if a certain faction gained enough supporters, it will start to impose tyrannical measures to ensure that they always achieve their goals even if the minority were appressed along the way.

the population grew a lot and was making more money

each played a major role in ending the cold war.