God(probably not the first)

Our belief in God is the measure of how much our humanity influences our view of reality, of how much sense we think the world must naturally make. God, Maker of Sense.

He will exist, under one name or another, for as long as people seek control over their lives, as long as people care how experiments turn out and whether their loved ones live or die. He's the role-model we look to when we try to imagine a world different from the chaos we're given, when we look for a humane reason for events to have fallen as they did. Our first belief in anything about persons in general is an archetype; our beliefs in the capacities of people, including ourselves, stem from our beliefs about the character of God, our ideal person. Inasmuch as we try to live up to this character, we are reflections of it.

This is the close association of religion with social community, where both personal character and the character of others is judged by assuming a shared aspiration to the same ideal. This is the fear of outsiders, whose character cannot be so reliably judged, and in whose company our own identity is threatened. These are the one or several personalities our cultures all seem to deify, hold up as role-models to admire or vilify or choose among for guidance.

It's too simple to dismiss these imagined heroes just because they exist only to help us know ourselves. All the blessings and damnation of our world rain down alike from our ability to pull sense out of the chaos, and without doubt this will be the skill on which the final judgement of humanity turns. Our fate will be decided by the assumptions with which we make it: Whether we think the world a humane place, and seek to control it by being humane, or imagine it rational and seek to control it with better assumptions, our guiding light is the image in our heads of a person succeeding at our task, of how they would do it; it's only while we can't see a way to our version of success that God exists, because that's when he's still needed. As a reference point.

Light is a good metaphor here: It reveals more, the closer you get to it; the world is better understood as you better understand how a person could ever understand it, as you more closely sympathize your notions of Self and Creator. But it blinds one as a focus of attention; worshipping someone on the basis that they made You is nothing but finely-tuned ego-worship, as indeed is a life occupied with self-congratulation & self-forgiveness. We all need a better self to live up to, whether or not we ever find one, but a life spent on self-judgement is one spent cultivating biases in our assumptions about the world; it will never make sense as long as we believe it should to us as we are now, nor for as long as we think we understand God.