There is a reason Genesis is called the book of beginnings. We are now in the 4th chapter of Genesis and still finding firsts.
verse 1 – First record of intercourse (“Adam knew Eve”)
verse 1 – First record of conception
verse 3 – First record of an offering to the LORD
verse 4 – First record of God respecting an offering
verse 5 – First record of God not respecting an offering (first time we find “unacceptable” worship)
verse 8 – First recorded murder/fratricide
verse 16 – First time someone is described as going “out from the presence of the LORD.”
verse 17 – First record of a city being built
verse 19 – First recorded incidence of bigamy
verse 21 – First record of music/musical instruments
verse 21 – First record of craftsmen working in bronze and iron.
verse 26 – First record of men calling on the name of the LORD.