Complex sentence: As in Comptean positivism's envisioned unity of science, neopositivists aimed to network all special sciences through the covering law model of scientific explanation, and ultimately--by stating boundary conditions and supplying bridge laws--reduce all special sciences to fundamental physics, the fundamental science.
Split into simpler sentences: As in Comptean positivism's envisioned unity of science, neopositivists aimed to network all special sciences through the covering law model of scientific explanation. And ultimately, by supplying boundary conditions and supplying bridge laws within the covering law model, all the special sciences' laws would reduce to fundamental physics, the fundamental science.