Conversation so far:
Who criticized Richard Pipes' approach?
The writings of Richard Pipes have provoked criticism in the scholarly community, for example in The Russian Review
Who was Richard Pipes?
Richard Pipes was an American academic who specialized in Russian history, particularly with respect to the Soviet Union, who espoused a strong anti-communist point of view throughout his career
What was notable out Richard Pipes' approach?
Critics have written that Pipes wrote at length about what Pipes described as Lenin's unspoken assumptions and conclusions while neglecting what Lenin actually said

Question: How did Pipes answer his critics?
Self-contained rewrite: How did Richard Pipes answer his critics?