I've consider other influences quite often. Actually, I suspect that these "outside influences" have more impact on what we do that we we tend to think of as the normal influences that we can see and measure... Gravity, vibrations/resonance, energy, elecro-magnetism, and the quantum phenomenon of "Schodinger's Cat" that "breaks the speed of light" all fight into this category.
Outside energies and influences are a reality, imho. Even though we don't always understand them and/or have the ability show them in concrete terms to each other.