How humans are "slaves", and how that leads to the existence of God.

[Minimalist]

When analyzing the journey of humanity through life, we can find it's no more than a set of actions, done to produce a desired output; the existence of a human itself is a conclusion of an action : that is birth.

Humanity always serves, even the smallest of actions cannot escape the domain of the action being a type of service; the only dynamic part in the equation is the side which the service if offered for, ranging from ourselves to include others, anything a human do can be immediately identified as a service.

Being dependent creatures, humanity can never escape the fact that they are served. By studying the environment, every reason that keeps humans alive is actually a service given to them; either it's a case of atheism or theism, we can say "earth supports human life" or say "God is blessing humanity to survive".
Despite the person's belief, humanity is being served, and our actions are all services.

The revolution in this concept, is an entity that doesn't get served. If a certain entity exists, it never gets served, then we face a crack in the concept  we define humans with : (a human always serves & get served); but that entity would be an entity that (always serves and never gets served).

From that point; the concept of God originates. Either believed in, or not, we can't define humans with another concept than the above : humans are dependent on services given by other entity.