"Successful" is such a poorly defined qualifier it makes your statement meaningless. I cannot argue against it, it would be like punching jelly. Please define

"Successful" is such a poorly defined qualifier it makes your statement meaningless. I cannot argue against it, it would be like punching jelly. Please define it concisely and accurately, using a quantifiable metric and no examples, so that I may either provide counter-examples to your statement or question the societal relevance of the metric you choose.