Naturalism has been playing a dominant role in anglo-American philosophy,however,being widely and severely criticized,naturalism is the most controversial theory due to the complexity of its explananda and the incompletement of the theory per se,especially in face of the objects to be naturalized like phenomenal consciousness and intentionality.The criticisms are from two main views:one is from varieties of reductionism and non-classical naturalism originated from the theory itself;the other is from the opposing theories in the form of non-reductionism and pluralism.This paper will discuss abo...