Context: Wieman's words proved prophetic. Though Process and Reality has been called "arguably the most impressive single metaphysical text of the twentieth century," it has been little-read and little-understood, partly because it demands – as Isabelle Stengers puts it – "that its readers accept the adventure of the questions that will separate them from every consensus." Whitehead questioned western philosophy's most dearly held assumptions about how the universe works, but in doing so he managed to anticipate a number of 21st century scientific and philosophical problems and provide novel solutions.

Question: Which publication is considered the most impressive metaphysical text?
Answer: Process and Reality

Question: Who thought Process and Reality was little-read because the reader has to separate them from normal thought?
Answer: Isabelle Stengers

Question: What philosophy in the west was challenged by Whitehead?
Answer: how the universe works

Question: What was Whitehead's philosophy able to anticipate for the 21st century?
Answer: scientific and philosophical problems

Question: What was the outcome of anticipating the scientific and philosophical problems Whitehead proposed?
Answer: novel solutions

Question: How has "Process and Reality" been described? 
Answer: "arguably the most impressive single metaphysical text of the twentieth century,"

Question: What did Isabelle Stengers say is the reason that "Process and Reality" is not commonly read and understood?
Answer: it demands – as Isabelle Stengers puts it – "that its readers accept the adventure of the questions that will separate them from every consensus."

Question: What effect did Whitehead have on the future of metaphysics?
Answer: he managed to anticipate a number of 21st century scientific and philosophical problems and provide novel solutions.

Question: How has "Process and Reality" been rejected?
Answer: Unanswerable

Question: What did Isabelle Stengers say is the reason that "Process and Reality" is commonly read and understood?
Answer: Unanswerable

Question:  What effect did Whitehead have on the past of metaphysics?
Answer: Unanswerable

Question: Which publication is considered the least impressive metaphysical text?
Answer: Unanswerable