The answer is: Cain

Gen 4:17

In Genesis 4:17, we indeed see that Cain, after leaving the comforts (if you can call them that) of Eden, built the first city and named it Enoch, after his son. This act of city-building is fascinating because it marks the first human effort to create a place of community, order, and civilization—an impressive feat following an intense life of turmoil. Many scholars see in this moment a sign of humanity’s inherent propensity to gather, celebrate, and innovate even in their darkest times.

Interestingly, the concept of cities resonates throughout the rest of the Bible. For instance, the city of Jerusalem later emerges as a hub of spiritual and cultural significance. In fact, the word "Jerusalem" means "City of Peace," contrasting profoundly with the legacy of Cain, who is associated with strife and murder.

Cain's city might also echo themes seen later in Revelation, wherein the imagery of a “new Jerusalem” symbolizes hope and restoration. It's an inspiring transformation from the shame and guilt linked to Cain’s actions.

Additionally, there's a play on words as some believe the name "Enoch" has meanings tied to teaching or initiation. In effect, it implies a starting point—a school of thought about society, written by humanity itself. Cities, for better or worse, have always been places where humanity learns, forges connections, and sometimes perpetuates its failings. This foundational moment lays the groundwork for every urban affair that follows! So while Cain set off to build, our understanding of community began to take shape, with lessons that resonate even today.