Why did the atlantic slave trade end?

Which of the following was a bold new idea expressed in the declaration of indenpendnce?

Which of these was one of the most important aspects of washington's presidency a. he did not consider how his actions would affect later presidents b. he came to believe that political parties would be good for the country. c. he insisted that congress make specific rules about the duties of the president d. he did not take advantage of the opportunity to keep the power the country offered him.

What was one major cause of worldwide conflict during the first decade of the 21st century?