WIKIPEDIA ARTICLE ON JEHOVAH'S WITNESSES:
Jehovah's Witnesses believe that Satan was originally a perfect angel who developed feelings of self-importance and craved worship. Satan influenced Adam and Eve to disobey God, and humanity subsequently became participants in a challenge involving the competing claims of Jehovah and Satan to universal sovereignty. Other angels who sided with Satan became demons.
Jehovah's Witnesses teach that Satan and his demons were cast down to earth from heaven after October 1, 1914, at which point the end times began. They believe that Satan is the ruler of the current world order, that human society is influenced and misled by Satan and his demons, and that they are a cause of human suffering. They also believe that human governments are controlled by Satan but that he does not directly control each human ruler.
Satan never made any sense to me! Here is one lone angel who becomes just as powerful as God. He has other angels follow him. He has Adam and Eve disobey God. Satan challenges God that Job only follows him because of all the benefits and wealth that are bestowed upon him. God lets Satan strike Job with a disease, the death of his livestock and family, and loss of his wealth. Satan is able to tempt Jesus, rules and influences the current World, controls human governments, and will control the ''new system'' for 1000 years.
How can one lonely angel be this powerful? How does he control humans and human governments? Why is Satan even allowed to live through Armageddon ( while all humans who didn't obey God be wiped out) and tempt all survivors and newly resurrected?
Maybe Satan is just an imagination from some very good storytellers!