Civil government was established by God; Matthew 22:21, Romans
13:1, 1 Timothy 2:1-4 and 1 Peter 2:13-17 all teach that. Because He established it, it is a legitimate area of activity for Christians. To speak out against political involvement, is to call God's wisdom into question and to allow the wicked to rule. It would also be strange to argue that God would have ordained and established self-government, family-government, church-government and civil-government, and we as Christians need to be involved with self, family and church, but yet leave civil government to the non-Christians to rule in place of the Christians - this just does not make sense.
Righteous transformation took place under Godly leaders: Deborah (Judges 4 & 5), Gideon (Judges 6-8), Hezekiah (II Kings 18-29) and Josiah (II Kings 18-20).
Many Christians believe that Satan is the ruler of this world. This issue is a fundamental presupposition or an assumption that will change the way we see many other issues as far as Scripture is concerned. One of the main ideas that we need to remember when looking at Scripture where Satan claims to be the god of the world, is that first of all we know that Satan is a liar (Genesis 3:4-5). Jesus also calls him a liar and the father of lies (John 8:44). We know that since the death and resurrection of Jesus Christ, Satan's authority is severely limited. John 12:31 says, “Thy judgement is upon this world, now the ruler of this world shall be cast out.” So Satan's status in this world has changed significantly.