No more than evos need to nail down some other cause. The theory of evolutioon is a general statement supporting the evidence at hand. It makes "obvious general statements" in view of the givens with which its proponents operate.
Evolution (the fact, not the theory) is due to changes in a population's gene pool, with changes more adaptable to the environment more likely to live on and pass those changes to the next generation (the theory).
That statement puts forth a cause. "The organization of matter that behaves under predictable laws" does not.