God limited the life span of the human being to 120 years because of its wickedness (Gen VI). He even sent the Flood to wipe them out whose every inclination of the thoughts of the human heart was only evil all the time. Such destructive thing he would not do again (Gen 8). Yet, at that time Noah lived 950 years (Gen 9), as the generations before him, see the previous post on lifespan. The oldest age record goes to methuselah 969 years old (Gen 5:21).
But seeing how mankind evolves god gave as a food to them not only the plants as in the beginning, but now also the animals, after the extraction all blood (Gen 9). Also, the mankind started to become egoistic as to build themselves the tower of babel “so that we may make a name for ourselves”, which means to me the identification process with an individuality believed as being separated from god was growing, instead of trusting in god and feeling the unity with the divine.
Where did that wickedness of the mind start? It was even in paradise: the shame of being naked was the first sign. Then, they ate the fruit they were not allowed to. Adam blamed Eve and Eve blamed the serpent instead of taking accountability (Gen 3). Cain’s mind was needy for the favor of god and therefore angry and he killed his brother Abel and lied to god (Gen 4) And the men started to marry any of the women they chose (Gen 6), which could refer to an unhealthy exaggeration of the sexual drive as this sentence alone does not make it directly clear what is the deviation from the harmonious mind.
With all this mental decay and eating fish and meat (even with no blood in it), the lifespan decreased gradually over nine generations from Noah’s 950 years (Gen 9) to only 148 years for the grandfather and 205 years for the father (Gen 11) of Abraham (175 years) (Gen 25). After him, not so many ages of life were are given. This is where the ordinary lifespan limitation of 120 years sets in even for the people who survived the Flood.
Genesis III, “10 He answered, “I heard you in the garden, and I was afraid because I was naked; so I hid.” 11 And he said, “Who told you that you were naked? Have you eaten from the tree that I commanded you not to eat from?” 12 The man said, “The woman you put here with me—she gave me some fruit from the tree, and I ate it.” 13 Then the Lord God said to the woman, “What is this you have done?” The woman said, “The serpent deceived me, and I ate.””
Genesis IV, “2 Now Abel kept flocks, and Cain worked the soil. 3 In the course of time Cain brought some of the fruits of the soil as an offering to the Lord.4 And Abel also brought an offering—fat portions from some of the firstborn of his flock. The Lord looked with favor on Abel and his offering, 5 but on Cain and his offering he did not look with favor. So Cain was very angry, and his face was downcast.
6 Then the Lord said to Cain, “Why are you angry? Why is your face downcast? 7 If you do what is right, will you not be accepted? But if you do not do what is right, sin is crouching at your door; it desires to have you, but you must rule over it.”
8 Now Cain said to his brother Abel, “Let’s go out to the field.”[d] While they were in the field, Cain attacked his brother Abel and killed him. 9 Then the Lord said to Cain, “Where is your brother Abel?” “I don’t know,” he replied. “Am I my brother’s keeper?” 10 The Lord said, “What have you done? Listen! Your brother’s blood cries out to me from the ground. 11 Now you are under a curse and driven from the ground, which opened its mouth to receive your brother’s blood from your hand. 12 When you work the ground, it will no longer yield its crops for you. You will be a restless wanderer on the earth.”
Genesis VI, “1 When human beings began to increase in number on the earth and daughters were born to them, 2 the sons of God saw that the daughters of humans were beautiful, and they married any of them they chose.3 Then the Lord said, “My Spirit will not contend with[a] humans forever,for they are mortal[b]; their days will be a hundred and twenty years.” [..]
4 The Nephilim were on the earth in those days—and also afterward—when the sons of God went to the daughters of humans and had children by them. They were the heroes of old, men of renown.
5 The Lord saw how great the wickedness of the human race had become on the earth, and that every inclination of the thoughts of the human heart was only evil all the time. 6 The Lord regretted that he had made human beings on the earth, and his heart was deeply troubled.7 So the Lord said, “I will wipe from the face of the earth the human race I have created—and with them the animals, the birds and the creatures that move along the ground—for I regret that I have made them.” 8 But Noah found favor in the eyes of the Lord. [..] 17 I am going to bring floodwaters on the earth to destroy all life under the heavens, every creature that has the breath of life in it. Everything on earth will perish. 18 But I will establish my covenant with you, and you will enter the ark—you and your sons and your wife and your sons’ wives with you.”
Genesis VIII, “20 Then Noah built an altar to the Lord and, taking some of all the clean animals and clean birds, he sacrificed burnt offerings on it. 21 The Lordsmelled the pleasing aroma and said in his heart: “Never again will I curse the ground because of humans, even though[a] every inclination of the human heart is evil from childhood. And never again will I destroy all living creatures, as I have done.”
Genesis IX, “2 The fear and dread of you will fall on all the beasts of the earth, and on all the birds in the sky, on every creature that moves along the ground, and on all the fish in the sea; they are given into your hands. 3 Everything that lives and moves about will be food for you. Just as I gave you the green plants, I now give you everything. 4 “But you must not eat meat that has its lifeblood still in it. [..] 28 After the flood Noah lived 350 years. 29 Noah lived a total of 950 years, and then he died.”
Genesis XI, “1 Now the whole world had one language and a common speech. 2 As people moved eastward,[a] they found a plain in Shinar[b] and settled there. 3 They said to each other, “Come, let’s make bricks and bake them thoroughly.” They used brick instead of stone, and tar for mortar. 4 Then they said, “Come, let us build ourselves a city, with a tower that reaches to the heavens, so that we may make a name for ourselves; otherwise we will be scattered over the face of the whole earth.”
5 But the Lord came down to see the city and the tower the people were building. 6 The Lord said, “If as one people speaking the same languagethey have begun to do this, then nothing they plan to do will be impossible for them. 7 Come, let us go down and confuse their language so they will not understand each other.” [..]
Two years after the flood, when Shem was 100 years old, he became the father[d] of Arphaxad. 11 And after he became the father of Arphaxad, Shem lived 500 years and had other sons and daughters. 12 When Arphaxad had lived 35 years, he became the father of Shelah.13 And after he became the father of Shelah, Arphaxad lived 403 years and had other sons and daughters.[e] 14 When Shelah had lived 30 years, he became the father of Eber. 15 And after he became the father of Eber, Shelah lived 403 years and had other sons and daughters. 16 When Eber had lived 34 years, he became the father of Peleg. 17 And after he became the father of Peleg, Eber lived 430 years and had other sons and daughters. 18 When Peleg had lived 30 years, he became the father of Reu. 19 And after he became the father of Reu, Peleg lived 209 years and had other sons and daughters. 20 When Reu had lived 32 years, he became the father of Serug. 21 And after he became the father of Serug, Reu lived 207 years and had other sons and daughters. 22 When Serug had lived 30 years, he became the father of Nahor. 23 And after he became the father of Nahor, Serug lived 200 years and had other sons and daughters. 24 When Nahor had lived 29 years, he became the father of Terah. 25 And after he became the father of Terah, Nahor lived 119 years and had other sons and daughters. 26 After Terah had lived 70 years, he became the father of Abram, Nahorand Haran.” [..]32 Terah lived 205 years, and he died in Harran.”
Genesis 25,”7 Abraham lived a hundred and seventy-five years. 8 Then Abraham breathed his last and died at a good old age, an old man and full of years; and he was gathered to his people”