Agni, I laud, the high priest, the god, the minister of sacrifice’ The invoker, lavishest of wealth. Thus begins the Rigveda.

They had elaborate rituals and paid immense importance to sacrifice.

In fact, in all other similar cultures, scriptures would include, sequences of events and details of the daily life, But in the Vedic culture, it was the way you did the rituals that was more important than the actual events.