Complex sentence: The empiricists'aversion to metaphysical explanations (like Descartes' vortex theory) precludes the importance of causality and has been downplayed (e.g. Newton's "Hypotheses non fingo").
Split into simpler sentences: The empiricists'aversion to metaphysical explanations (like Descartes' vortex theory) lends heavy influence against the supposed importance of causality. Causality has accordingly sometimes been downplayed (e.g. Newton's "Hypotheses non fingo").