So far, it's the best we have. Did Darwin get it all correctly down, not likely. Did psychology stop at Sigmund Freud, No. Did physics stop at Isaac Newton? Nope. Each of these fellows did lay down an overview a framework to assist us in understanding their areas of interest. No doubt, there were gaps and misunderstandings which hopefully get corrected along the way. Right now, I am intrigued with emergence theory, sometimes called quantum gravity research. It is interested in finding a way to reconcile general relativity with quantum mechanics-- a kind of new theory of everything. We will see how it works out!