Conversation so far:
Who was Norman Borlaug's most vocal critic?
Throughout his years of research, Borlaug's programs often faced opposition by people who consider genetic crossbreeding to be unnatural or to have negative effects.
What was critic's biggest issue with Norman Borlaug?
Borlaug's work has been criticized for bringing large-scale monoculture, input-intensive farming techniques to countries that had previously relied on subsistence farming.
Did Borlaug prove his critics wrong?

Question: What did he think about his critics?
Self-contained rewrite: What did Borlaug think about his critics?