The answer is John Adams. John Adams was definitely the first vice president. And he was for sure one of the authors of the Declaration of Independence
The Roosevelt Corollary's purpose was to keep European powers out of the Americas (and thus out of the United States), it was meant to maintain the policy against foreign intervention in the Americas. It was also used to justify US power and intervention in other parts of the Americas.
The CCC and WPA got people from a wide range of experiences together for the first time and broke apart some of the arbitrary lines that divided Americans. It allowed people from cities and the country and of different religions to live and work together and to see that there is more that unites us than divides us.
Increased consumer spending driven by purchasing with credit.