What were the main political factors that caused the power of Rome to slip away?

Explanation:

Empire failed to enforce its rule, and its vast territory was divided into several successor polities. The Roman Empire lost the strengths that had allowed it to exercise effective control over its Western provinces.Increasing pressure from invading barbarians outside Roman culture also contributed greatly to the collapse. Emperors, the internal struggles for power, the religious changes of the period, and the efficiency of the civil administration.

following type of cultural development caused people to want and buy new products on the market :

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.