How can you have people who's generations were not perfect if all are decended from Adam? You couldn't, yet the bible verifies that the world was full of people who were not perfect in their generations.

Genesis 6
1And it came to pass, when men began to multiply on the face of the earth, and daughters were born unto them,

2That the sons of God saw the daughters of men that they were fair; and they took them wives of all which they chose.

3And the LORD said, My spirit shall not always strive with man, for that he also is flesh: yet his days shall be an hundred and twenty years.

4There were giants in the earth in those days; and also after that, when the sons of God came in unto the daughters of men, and they bare children to them, the same became mighty men which were of old, men of renown.

5And God saw that the wickedness of man was great in the earth, and that every imagination of the thoughts of his heart was only evil continually.

6And it repented the LORD that he had made man on the earth, and it grieved him at his heart.

7And the LORD said, I will destroy man whom I have created from the face of the earth; both man, and beast, and the creeping thing, and the fowls of the air; for it repenteth me that I have made them.


Genealogy:
The descent of a person, family, or group from an ancestor or ancestors


English
[edit] Etymology
From Old French and Modern French généalogie < Late Latin genealogia < Ancient Greek γενεαλογία (genealogia) < γενεά (genea) "generation, descent" and -λογία (-logia) "study of"
[edit] Noun

genealogy (countable and uncountable; plural genealogies)
1. (countable) The descent of a person, family, or group from an ancestor or ancestors; lineage or pedigree.
2. (countable) A record or table of such descent; a family tree.
3. (uncountable) The study, and formal recording of such descents.


Genesis 6:8But Noah found grace in the eyes of the LORD.

9These are the generations of Noah: Noah was a just man and perfect in his generations, and Noah walked with God.

10And Noah begat three sons, Shem, Ham, and Japheth.


Can you explain this away or ignor it if it is true?

Noah, a man perfect in his generations.

Genesis 5
1This is the book of the generations of Adam. In the day that God created man, in the likeness of God made he him;

2Male and female created he them; and blessed them, and called their name Adam, in the day when they were created.

3And Adam lived an hundred and thirty years, and begat a son in his own likeness, and after his image; and called his name Seth:

4And the days of Adam after he had begotten Seth were eight hundred years: and he begat sons and daughters:

5And all the days that Adam lived were nine hundred and thirty years: and he died.

6And Seth lived an hundred and five years, and begat Enos:

7And Seth lived after he begat Enos eight hundred and seven years, and begat sons and daughters:

8And all the days of Seth were nine hundred and twelve years: and he died.

9And Enos lived ninety years, and begat Cainan:

10And Enos lived after he begat Cainan eight hundred and fifteen years, and begat sons and daughters:

11And all the days of Enos were nine hundred and five years: and he died.

12And Cainan lived seventy years and begat Mahalaleel:

13And Cainan lived after he begat Mahalaleel eight hundred and forty years, and begat sons and daughters:

14And all the days of Cainan were nine hundred and ten years: and he died.

15And Mahalaleel lived sixty and five years, and begat Jared:

16And Mahalaleel lived after he begat Jared eight hundred and thirty years, and begat sons and daughters:

17And all the days of Mahalaleel were eight hundred ninety and five years: and he died.

18And Jared lived an hundred sixty and two years, and he begat Enoch:

19And Jared lived after he begat Enoch eight hundred years, and begat sons and daughters:

20And all the days of Jared were nine hundred sixty and two years: and he died.

21And Enoch lived sixty and five years, and begat Methuselah:

22And Enoch walked with God after he begat Methuselah three hundred years, and begat sons and daughters:

23And all the days of Enoch were three hundred sixty and five years:

24And Enoch walked with God: and he was not; for God took him.

25And Methuselah lived an hundred eighty and seven years, and begat Lamech.

26And Methuselah lived after he begat Lamech seven hundred eighty and two years, and begat sons and daughters:

27And all the days of Methuselah were nine hundred sixty and nine years: and he died.

28And Lamech lived an hundred eighty and two years, and begat a son:

29And he called his name Noah, saying, This same shall comfort us concerning our work and toil of our hands, because of the ground which the LORD hath cursed.

30And Lamech lived after he begat Noah five hundred ninety and five years, and begat sons and daughters:

31And all the days of Lamech were seven hundred seventy and seven years: and he died.

32And Noah was five hundred years old: and Noah begat Shem, Ham, and Japheth.