Answer:
Invasions from Barbarian tribes, The rising of Constantinople, Overexpansion, Government Corruption and Instability, Economic Troubles, Slave reliance for money, and Christainity rising.
The sociological perspective that's most likely to focus on this would be the functionalist perspective.
<span>be excessively optimistic, be realistic
This is a practice in which expectations about how much time will be expected to finish a future undertaking show a positive thinking inclination and belittle the time required.
This phenomenon happens paying little mind to the person's information that past undertakings of a comparative sort have taken more time to finish than by and large arranged. The predisposition just influences expectations about one's own undertakings; when outside onlookers foresee assignment consummation times, they demonstrate a negative inclination, overestimating the time required</span>
