Complex sentence: Similarly metals undergo collective behavior and interactions that are not reducible to the behavior of an individual atom within that metal, and it has been argued that the laws which describe this collective behavior are no less fundamental than the laws that describe the atoms themselves.
Split into simpler sentences: Similarly metals undergo collective behavior and interactions that are not reducible to the behavior of an individual atom within that metal. It is argued that the principles which describe this collective behavior are no less fundamental than the laws that describe the atoms themselves.