Complex sentence: He had been highlighted in James Surowiecki's novel "The Wisdom of Crowds", which posits that a diverse collection of people is likely to make certain decisions and predictions better than independently operating individuals or even experts.
Split into simpler sentences: He had been highlighted in James Surowiecki's novel "The Wisdom of Crowds". The central thesis of "The Wisdom of Crowds" is that a diverse collection of people is likely to make certain decisions and predictions better than independently operating individuals or even experts.