Title: History of science.
Question: What is the main goal of sociology?

Title: Treaty.
Question: By what did the US federal government provide contractual relations with Indian tribes following the Indian Appropriations Act of March 3, 1871?

Title: United States dollar.
Question: What does the decline in value of the dollar correspond to?

Title: Botany.
Question:
What would be an indication of a shared inheritance in two cacti?