Carl Jung was a close compatriot of Freud for many years, and they developed a very strong relationship. A major theoretical disagreement between the...

Carl Jung was a close compatriot of Freud for many years, and they developed a very strong relationship. A major theoretical disagreement between the two created a split in their relationship. Does this historical perspective validate or invalidate the modern-day applicability of Neo-Freudian theories? Explain. Please provide reference.