I want to know the answer to the following question:
Which new concept has greatly taken over Simpsons much debated theoretical systematization?
All the background I'm provided with is that "Since Simpson's classification, the paleontological record has been recalibrated, and the intervening years have seen much debate and progress concerning the theoretical underpinnings of systematization itself, partly through the new concept of cladistics.". Is that enough to answer the question?
Answer: yes