Well, this might not be an answer you’re looking for, but:
There are theories of life and existence, without listing them out properly, I think it would be hard to answer this:
Scientific Realism
Scientific theories offer accurate reference to or portrayal of independent reality.
Matter is still believed to exist. Physical matter is seen on an Atomic level.
Phenomenalism
The view that no physical objects exist, but only the senses we receive exist.
Sense bundles in a void.
Common-sense realism
An individual’s common sense offers an accurate portrayal of independent reality.
What we see, is what it is, is physically there. (contradictions: moon – flat disc)
I think if reality was truly in the scientific model, our lives would be pretty… insignificant.
I personally like to think that Phenomenalism is true? It seems to place our feelings and existence in a higher value than the scientific view.
Sorry if this isn’t a very good answer :(