What is a summary of the book of Genesis?

from the old testament

• In Genesis, Moses traces the promised seed from Genesis 3 through early history and into the start of Israel, the 12 sons (tribes) of Jacob. It explains both why Israel exists and its theological importance in God’s plans.
• It begins by describing creation and humanity (Genesis 1–2) as “very good” (Genesis 1:31). There was no sin, and Adam and Eve, the first humans, had a personal relationship with God.
• However, through the temptation of the serpent (Satan, cf. Revelation 12:9), they desired to be like God rather than obeying God (Genesis 3:1–7). The result of their rebellion was God’s judgment of corruption and death (Genesis 3:16–19).
• However, before judging humanity, God judged the serpent (Genesis 3:14) and included the following promise: “I will put enmity between you and the woman, and between your seed and her seed; he shall bruise you on the head, and you shall bruise him on the heel.” (Genesis 3:15, NASB). Church history later recognized this as the proto-evangelion (“first gospel”). In this first, early form, God spoke about two seeds (descendants). One descendant would be from the serpent and another from the woman. While the serpent’s seed would hurt the woman’s seed, the woman’s seed would kill the serpent’s seed. This sets the framework for the rest of Genesis. There are two competing lines, one is unrighteous, and one is righteous. Moses shows how the righteous line was threatened with extinction multiple times, yet God intervened to preserve it.
• Cain and Abel: Adam and Eve had two sons. Abel was righteous, whereas Cain was not (Genesis 4:3–5). Cain (the unrighteous line) killed Abel (the righteous line). However, God preserved the righteous line by giving Eve a second righteous son, Seth (Genesis 4:25).
• The Flood: over the next few thousand years, humanity’s sin grew greatly, such that God remarked that “every intent of the thoughts of his heart was only evil continually” (Genesis 6:5). The righteous line had all but been eliminated by the sheer amount of sin. God intervened by destroying all of humanity with the flood, preserving Noah’s line (Genesis 6:11–7:1).
• The Tower of Babel: After the flood, humanity remained as wicked as before. Over time, the people again rebelled against God, this time gathering together and refusing to fill the earth as He had commanded (Genesis 9:1). As just before the flood, it again appeared that evil was going to prevail, but God came down and scattered them by scrambling their languages, forcing them to spread out over the earth (Genesis 11:8–9).
• Abram’s Call: After scattering the nations, we see God preserving the righteous line from among those nations in Abram. Though a pagan like the rest, God called him out and promised that through his line the righteous seed would come (Genesis 12:1–3).
• Abram’s Sacrifice: After struggling to have his first son, Isaac was finally born to Abram and Sarai (Genesis 21:1–3). This seemed to be the start of God’s promise of descendants, but then God commanded Abram to sacrifice Isaac (Genesis 22:1–2). Abram obeyed, despite not understanding but trusting that God would still preserve the line, even if it meant bringing Isaac back to life (cf. Hebrews 11:19). Because of his obedience, God intervened by stopping the sacrifice and providing a ram in Isaac’s place, preserving the righteous line and showing that Abram was worthy to be the father of that line (Genesis 22:13).
• Jacob as Israel: Isaac had two sons, Esau and Jacob. Esau was the firstborn, and thus presumed to be the one through whom Jacob’s blessing would go. However, even before they were born, God had chosen Jacob to continue the righteous line (Genesis 25:23). After many years of growing Jacob from a deceitful man to an honorable one, God renamed him "Israel" (Genesis 32:28). He was the start of that nation and through whom God was bringing the righteous line.
• Joseph and the Famine: Jacob had twelve children, including Joseph. His brothers hated him, so they sold him into slavery (Genesis 37:28). He ended up in Egypt and eventually became the second most powerful man after interpreting God’s dream that He was bringing an intense famine on the entire land (Genesis 41:25–27). God used Joseph to stockpile food, which prevented Jacob and his sons from dying (Genesis 45:9–11) and eventually led them to move to Egypt, where the Israelites would begin to multiply and flourish (Genesis 47:27).
• The end of Genesis records Joseph’s famous statement, “You meant evil against me, but God meant it for good in order to bring about this present result, to preserve many people alive” (Genesis 50:20). Moses demonstrated how, from humanity’s rebellion through the start of Israel, God was preserving the line of His promised righteous seed. For Israel, Genesis was a book of comfort that showed them that God would continue to care for them and that, through them, the Messiah would come.

from the new testament

• Jesus was the fulfillment of the promised seed. He was born in the line of Abraham (Matthew 1:1), and specifically in the line of Judah, being a descendant of David (Romans 1:3). Paul identified Him as the promised Seed (Galatians 3:16), and through His death, He put an end to death (1 Corinthians 15:54–55).
• While the serpent’s line continues to flourish through today, in Revelation we learn that Jesus is returning (Revelation 19:11). At that time, He will crush the serpent once and for all (Revelation 20:10) and rule the earth in righteousness (Revelation 20:4–6).

implications for today

Right after we sinned, God promised a Savior (Genesis 3:15). While the promise was vague at the time, with aspects such as being born through the line of Abraham (Genesis 12:3), His role as King (2 Samuel 7:12–16), being God (Isaiah 9:6), and dying a sacrificial death (Isaiah 53:5–6) revealed over time, what was understood was that God was providing salvation. From Eve’s statements about Abel and Seth (Genesis 4:1, 25) to those about Noah (Genesis 5:29), to understandings of Isaac (Genesis 21:12), to the dual blessings between Judah and Joseph (Genesis 49:10, 22–26), humanity has been looking for “the one” ever since.

It took thousands of years until the angel told Mary that her son, Jesus, was that savior (Matthew 1:21). He did not come as expected, as a mighty warrior who took down the corrupt government (John 6:15). Instead, He came through humble birth (Luke 2:7) to take down Satan (1 John 3:8). He accomplished this by living the perfect life we cannot live and then dying the death we deserved. He resurrected, proving His death had satisfied the Father’s wrath. God will save all those who trust in His Savior.

He now lives in heaven, awaiting the command to return to earth. When He does, He will then be the mighty warrior, single-handedly destroying the wicked (Revelation 19:11–21) and establishing His rule on earth, restoring creation to how it was before the fall. When that is done, all the wicked will be judged (Revelation 20:11–15), the new heavens and new earth will come (Revelation 21:1), and Jesus and His people will reign forevermore (Revelation 22:5).

Right now, God is giving you the opportunity to receive His salvation. Consider your eternity, repent of your sin, and trust in the Savior who has come!