[23]  Satan is the ruler of this system of things

3 years after Adam sinned and was thrown out of the garden, Satan was given secular rulership over mankind in return for his firstborn angelic rights by Michael who had agreed to ransom Adam and been given a 6,000 year headlease over Adam. and all of his begotten children - see U17. Paul says...

14 Nevertheless, death ruled as king from Adam down to Moses, even over those who had not sinned after the likeness of the transgression by Adam, who bears a resemblance to him that was to come (Romans 5).

17 For if by the trespass of the one [man] death ruled as king through that one, much more will those who receive the abundance of the undeserved kindness and of the free gift of righteousness rule as kings in life through the one [person], Jesus Christ (Romans 5).

Death is Satan's name since he brought it about. Jesus is called 'the life', and Satan is called 'the death', or perhaps just plain 'death' to his friends. So he ruled from Adam down to Moses over everyone because of the trespass of the one man Adam and more particularly due to the greater bowl of soup deal - see U17.. God himself ruled the Jews as Caesar once they agreed to obey the Law Covenant (which was both secular and sacred). Satan continued to rule mankind until the end of his 6,000 year lease on 2012Nisan14. Then he had a further extension in rulership for 2,000 days of Mark5 to payback his 1st century eviction and then a further extension for Jesus' miracle ministry which gave him another 1266 days (the length of the period wherein Jesus exercised Kingdom power in Satan's system from the first miracle at Cana on 29Heshvan29 to Pentecost on 33Sivan5) 

Michael's 6,000 year ARC headlease on Adam starts       Satan's 6,000 year lease as Caesar to Adam starts        End of Michael's lease                                                                End of Satan's lease
3993Nisan17 (knowledge of Good)                                     3989Nisan17 (knowledge of Good and Bad)                    2008Nisan14 (Largest Time of the End of Daniel12 begins)      2012Nisan14    
                                     4 years                                                                          6000 less 4 years                                                                          4 years

There is no point in have such authority unless you can wield it with a global perspective. Satan has been trying to create that perspective through the earthly spying agencies. But their vision is very limited when compared to the ark from which heavenly mountain/administration one can see all the kingdoms of the earth in an instant of time...

8 Again the Devil took him along to an unusually high mountain, and showed him all the kingdoms of the world and their glory, (Matthew 4 NWT)
5 So he brought him up and showed him all the kingdoms of the inhabited earth in an instant of time; (Luke 4 NWT)

He is referred to in scripture as the God of this system of things...

3 If, now, the good news we declare is in fact veiled, it is veiled among those who are perishing,
4 among whom the god of this system of things has blinded the minds of the unbelievers, that the illumination of the glorious good news about the Christ, who is the image of God, might not shine through (2 Corinthians 4).
He is 'the ruler of the world' for Jesus said, just before he died:

30 I shall not speak much with you anymore, for the ruler of the world is coming. And he has no hold on me (John 14).

Satan had no hold of Jesus because Jesus was non adamic and Satan's sublease was over Adam. But this ruler will be chucked out:

31 Now there is a judging of this world; now the ruler of this world will be cast out (John 12).

In fact he is locked up for most of the kingdom of God, as we shall see below. 

So the end of the world, is the end of his world, not the end of the planet. It is the end of his system of things which is the current system of things, a system which started at the founding of the world. The founding of the world was the agreement by Jesus to ransom Adam after his trespass. For that agreement gave man a future that Satan had tried to deny us. This was the start of the 7th creative day of Genesis, when God rested from his creative works:

3 For we who have exercised faith do enter into the rest, just as he has said: So I swore in my anger, They shall not enter into my rest, although his works were finished from the founding of the world [on 3993Nisan14].
4 For in one place he has said of the seventh day as follows: And God rested on the seventh day from all his works,
5 and again in this place: They shall not enter into my rest (Hebrews 4).

God's last creative act was to make some clothes for Adam and Eve at the time of their sin. Actually it took him 3 days to zap their genes and transform them from non adamic ageless to adamic ageing from 3993Nisan14-3993Nisan15, following the pattern of the death and resurrection of the Christ, the last Adam. 

21 And Jehovah God proceeded to make long garments of skin for Adam and for his wife and to clothe them (Genesis 3).

This scripture is literally true, God did make them both clothes. But it also has a greater meaning, a cryptic meaning, a Times crossword meaning, as we have seen in I15. So Adam's sin was the founding of the World, the beginning of the current system of things. And the God of this system of things, the secular ruler of this world, is Satan, whose name is death. This is how Satan was able to offer all the kingdoms of the world to Jesus, if he would perform one act of worship to him:

5 So he brought him up and showed him all the kingdoms of the inhabited earth in an instant of time.
6 And the Devil said to him: I will give you all this authority and the glory of them, because it has been delivered to me, and to whomever I wish I give it.
7 You, therefore, if you do an act of worship before me, it will all be yours.
8 In reply Jesus said to him: It is written, It is Jehovah your God you must worship, and it is to him alone you must render sacred service (Luke 4).

Jesus did not say, who are you kidding? You do not own any kingdoms! He knew that Satan did have these kingdoms to give, because he gave them to him for 6,000 years in return for Satan's firstborn angelic rights - see U27. He also knew that Satan had the practice of giving them to various people. But Jesus was not interested in status, or in the glory of men, and he certainly did not want to be first lieutenant to a lying murderer whom he himself had empowered. 

It is of course a huge realisation that Satan is the God of this system of things and the ruler of the world. And we appreciate that if this concept is new to the reader it may cause some serious consternation. But remember that Satan can only act within prescribed limits set by God. God is the referee here, and Satan is just a very dirty team captain, he is not the head of FIFA (although some might disagree). But he does have a lot of supporters. 

God only allows Satan's continued existence and authority in order that we can learn from him without having ourselves to become like him. But nonetheless the world is the Titanic and Satan is the captain, and Sin is the iceberg, but Jesus is the lifeboat. However in his case it will not be the rich ones who get in first, whilst the poor are locked in below, in fact quite the reverse. Anyone and everyone who wants to get in and be saved will be, and the rich, because they falsely believe that they have got it made already, will, in general find it harder to leave their comfort zone. They can be trapped by their own physical success. Come on guys, wake up!!  In fact the scripture says

19 We know we originate with God, but the whole world is lying in the [power of the] wicked one (1 John 5).

Here is all the divine authority of Satan and the Dragon...

1254 day ministry payback (29Heshvan29 to 33Sivan5 less 33Nisan14-16 and 33Iyyar25-Sivan5) runs from 2015Chislev20 to 2019Sivan14 - 1254 days.

Satan's             11th zoar first fruits    11th Zoar Pentecost                       40 Month installed     Jesus' 42 month    9th 1NC first fruits               9th 1NC Pentecost       Satan's 42         3rd 1NC first fruits       3rd 1NC Pentecost
6,000 year        Jesus appointed         Jesus installed as   Abrahamic       Wilderness begins    Lease ends           Satan's 42 month Ministry   Satan reinstalled           month ministry  Dragon's 42 month     Dragon installed as    Dragon's 42 month
Lease ends      Caesar to Adam         Caesar to Adam      Passover         Zoar Pentecost         Isaaic Passover    payback appointment          as Caesar to Adam       payback ends    Lease begins              Caesar to Adam        Authority Lease ends
2012Nisan14    2012Nisan16              2012Sivan5             2012Sivan14    2012Ab5                   2015Chislev14      2015Chislev20                     2015Shebat9                 2019Sivan14     2019Sivan18               2019Ab7                    2022Shebat14
                           Jesus' Installation                          42 month non adamic lease                                                     Satan's reinstallation   Ministry payback lease                          Dragon's installation  42 month Authority of Revelation13

Start of demon possession payback   End of possession payback   Demonic Passover     Eviction from heaven   Demon Possession starts         Last FRC Passover entry           End of the lava flood                                   12th crop of Revelation22
2012Nisan16 (1NC first fruits)             2017Tebbeth6                         2017Tebbeth14           2017Tebbeth20            2017Shebat20                            2023Elul10 Possession ends     2023Adar4 (end of ride of 4th horse)          2024Iyyar14
2060 day 1st century eviction payback      8x war of  Revelation 12:7    6x eviction of Rev 12:8  30 step Jacob's ladder  2000 day 21st century possession                    174 days                    70x of the leftover ones of Revelation 19:21

2000 days of possession plus 30 days up and 30 days down Jacob's ladder making 2060 days is the total time of being evicted from heaven.
3 demons to each pig gives us 3 demonic fulfilments of the 2,000 days of possession, making a total of 6,000 day of demon possession, a legion of days. One in the first century and 2 in the 21st (the payback and the possession).