Genesis 5:1-32
When God created mankind, he made them in the likeness of God. He created them male and female and blessed them. And he named them “Mankind” when they were created.
When Adam had lived 130 years, he had a son in his own likeness, in his own image; and he named him Seth. After Seth was born, Adam lived 800 years and had other sons and daughters. Altogether, Adam lived a total of 930 years, and then he died.
........When Lamech had lived 182 years, he had a son. He named him Noah and said, “He will comfort us in the labor and painful toil of our hands caused by the ground the Lord has cursed.” After Noah was born, Lamech lived 595 years and had other sons and daughters. Altogether, Lamech lived a total of 777 years, and then he died.
After Noah was 500 years old, he became the father of Shem, Ham and Japheth.
Why?
There were many sons and grandsons of Adam, and the Lord called them Mankind.
Finally, Noah was born, he is God's love man in that generation.
How?
Don't care about what most mankind cares about. but only Noah is the chosen one by the Lord in that generation.