Why did the Jewish Need the genesis?

Im Catholic and for a project i need to know the historical content of the genesis stories. Why did the Jews need them in the first place and why were they written ??????

Allah is your lord. He alone deserves to be worshiped. Do your research.

dear lord baby Jesus.
dear 8 pound 6 ounces ..new born infant Jesus. don't even know a word yet. Lyon there in your ghost manger, just loo kin at baby Einstein developmental videos, learn in about shapes and colors. i would like to thank you for bringing me and my mama together, and also that my kids no longer sound like retarded gang-bangers.

That demented ventriloquist Moses wrote them, he and his syphilitic half-brother Aaron. Who says anybody needed them?

everyone needs the word of God...TO SHOW US WHAT HAPPENED..

Genealogy of Jesus, Enoch son #7, Jude 14,15, Noah son #10, Abraham
son #20, Matt.1:1-17; Jesus will be son #62. Genenis to Mattherw.

Adam-130,105,90,70,65,162,65,187,182= 1056 Noah born.
Gen.5:3, 6, 9, 12, 15, 18,21,25,28-Noah born, Gen.7:6, age 600, flood,
yr 1656, Noah dies yr 2006.
Shem at 2, 35, 30, 34, 30, 32, 30, 29= 222ND yr, Terah born, dies yr 2083.
Gen.11:10, 12, 14, 16, 18, 20, 22, 24= Terah born, dies age 205, Gen.11:32.

Yr 0130, at Adam, Cain kills Abel, Seth is born. He dies age 930, Gen.5:5.
Yr 0130, at Seth, plus 105 yrs, his son( he dies age 912, Gen.5:8, yr 1042).
Yr 0235, at Enos, Plus 090 yrs, his son( he dies age 905, Gen.5:11, yr 1140).
Yr 0325, at Cainan, plus 70 yrs, his son( he dies age 910, Gen.5:14, yr 1235).
Yr 0395, at Mahalaleel, + 65 yrs, his son(he dies age 895, Gen.5:17, yr 1290).
Yr 0460, at Jared, plus 162 yrs, his son(he dies age 962, Gen.5:20, yr 1422).
Yr 0622, at Enoch, plus 65(he dies age 365, yr 987, Gen.5:23,24, Adam 930).
Yr 0687, at Methuselah, + 187 yrs his son(he dies age 969, Gen.5:27, yr 1656).
Yr 0874, at Lamech, + 182(he dies age 777, Gen.5:31, yr 1651). Gen.9:28,29.
Yr 1056, at Noah[age 600 flood, Gen.7:6, yr 1656(age 950, dies, yr 2006 -^-).
Yr 1558, at Shem, plus 100(he dies age 600, yr 2158, 25 yrs before Abraham).
Yr 1658, at Arphaxad, plus 35( he dies age 483, year 2141-Shem 2158).
Yr 1693, at Salah, plus 30(he dies age 433, year 2126, Shem 2158).
Yr 1723, at Eber, plus 34(he died age 464, year 2187, Shem 2158).
Yr 1757, at Peleg, plus 30(he dies age 239, year 1996, Shem 2158).
Yr 1787, at Rue, plus 32(he dies age 239, year 2026, Shem 2158).
Yr 1819, at Serug, plus 30(he dies age 230, year 2049, Shem 2158).
Yr 1849, at Nahor, Plus 29, yr 222nd at Terah(he dies age 148, year 1997].
Yr 1878, at Terah(dies age 205, year 2083, Abraham age 75 son #20, Gen.12:4.
Yr 2083, at Abraham's covenant, Gen.15:13[400th yr]16[4th gen], 18[to land].
Yr 2108, at Isaac born, Gen.21:5; yr 2113, Ishmael departs, Isaac is heir.
Yr 2288, at Isaac dead. Gen.35:28,29, Jacob age 120, 130, 147, Gen.47:9,28.
Yr 2315, at Joseph age 57 in Egypt, dies age 110, Gen.50:22-26, end Genesis.
Yr 2368, at 1698 BCE.

Pretty much every religion has a creation myth. Judaism is no different.