And if not, what else could explain the galaxy rotation curves, the behaviour of galaxies in clusters and cosmic lensing?

So there have been serious thoughts about modifying the action of gravity but there are observations of galactic behaviour indicating that such a theory wouldn't work.

But I haven't heard of any scientist suggesting that a cause could act universally in addition to the forces.

Yet, despite the spectacular success of the standard model of quantum and particle physics, one can still agree with Richard Feynman, Nobel prize winning physicist extraordinaire, and insist that nobody understands quantum mechanics.

And hence, also, there are still quantum mechanical interpretation as various and conflicting as the Copenhagen, many worlds and de Broglie-Bohm accounts. And the last of these interpretations is a systematic nathematically worked out caount with its own mechanics that does describe a distnct cause acting in addition to the forces, called the quantum potential.

So could all the problems in theoretical physics including those in cosmology boil down to the fact that physics is still stuck with the push or pull causes that can't, by themselves, be described to explain how the universe is naturally organised either on the smallest or the cosmic scale?

I've outlined a theory on my blog that gives quite deatiledreasons to consider that this is so, to find it google> foranewageofreason