I believe there were humans before Adam, but only he and his descendants received the soul/spirit of God, that can be made immortal provided we are deemed to be worthy. Revelation 21:6-7
Re the 6000 year period decreed by God, for mans governance, to be followed by 1000 years of Jesus' Kingdom, this is proved by the simple addition of the times as given in our Bibles:
7000 years from the Creation to the Completion of Mankind:
Genesis 1:27 Adam was created in 3970.5 BCE [Added back from 586 BCE]
Gen 5:3 Seth +130, Gen 5:6 Enoch +105, Gen 5:9 Kenan +90, Gen 5:12 Mahalalel +70, Gen 5:15 Jared +65, Gen 5:18 Enoch +162, Gen 5:21 Methuselah +65, Gen 5:25 Lamech +187, Gen 5:28 Noah+182, Gen 6:7 The Flood came when Noah was +600, Gen 11:10 Our year 2314.5 BCE
Arpachshad +2 - born to Shem after the flood. Gen 11:12 Selah +35, Gen 11:14 Heber +30, Gen 11:16 Peleg +34, Gen 11:18 Reu +30, Gen 11:20 Serug +32, Gen 11:22 Nahor +30 , Gen 11:24 Terah +29, Gen 11:26 Abram +70, Abram was +52 when God called him and they left Ur. Our year 1970.5 BCE He lived in Haran for 23 years, then went to Canaan at age 75. Genesis 12:4 Total years so far = 2000
Gen 17:1, Abraham was 99 when the Covenant was made with God. +47 Genesis 17:1-8
Galatians 3:17 Paul states that the Law was given +430 after the Covenant. Total years elapsed until the Exodus – 2477, in our year 1493.5 BCE.
[Many ancient records say Comet Typhon passed close the earth at that time. It was the cause of many of the disasters in Egypt.]
1 Kings 6:1 The Temple construction starts, in the 4th year of King Solomon +480 since the Torah was given at the Exodus.. 1 Kings 11:42 Solomon 40 minus 4 = +36, 1 Kings 14:21 Rehoboam +17, 1 Kings 15:2 Abijah +3, 2 Chron 16:13 Asa +41, 1 Kings 22:42 Jehoshaphat +25, 2 Kings 8:17 Jehoram +8, 2 Kings 8:26 Ahaziah +1, 2 Kings 11:1-3 Athaliah +6, 2 Kings 12:1-3 Joash +40, 2 Kings 14:1-2 Amaziah +29, 2 Kings 15:1-2 Azariah +52, 2 Kings 15:32 Jotham +16, 2 Kings 16:1-2 Ahaz +16, 2 Kings 18:1-2 Hezekiah +29, 2 Kings 21:1 Manasseh +55, 2 Kings 21:19 Amon +2, 2 Kings 22:1-2 Josiah +31, 2 Kings 22:31 Jehoahaz +3mths, 2 Kings 23:31 Jehoiakim +11, 2 Kings 24:8 Jehoichin +3mths, 2 Kings 24:18 Zedekiah +11, who ruled until the Babylonian captivity in our year 586 BCE.
Total elapsed years to the first exile of Judah = 3386.5
586 BCE + 613.5 years + 2 comes to 29.5 CE, the date of Jesus’ baptism. Luke 3:1 Plus 2 to include the total number of elapsed years, as our calendar system counts years from their commencement.
3386.5 + 613.5 = 4000 years.
July 2017.5 CE - 29.5 CE = 1988 years since the commencement of Jesus’ Ministry.
1988 + 4000 = 5988 years, is where we are now. 5988 + 12 = 6000 years
2017.5 CE + 12 = 2029.5 CE Exactly 2000 years to the end of the present Church age. 4000 since Abraham, 6000 since Adam. Next comes the 1000 year reign of Jesus.
7000 years is God’s decreed time for mankind.
Those who have been found worthy will go into Eternity with God. Revelation 22:1-5
47 Bible verses