What was the key internal weakness of the roman empire?

The key internal weakness in the Roman Empire was the lack of political unity. This resulted in the authority of the emperors being challenged every now and then. As a result, there was instability due to usurpers and civil wars.

unbeknownst to the slave-ship captains, the daily dancing and exercise regime and vernacular dance are also derived from america's african-based slave legacy. both are african-american cuisines from the slavery era.

explanation:

oil! is what i am assuming