There is an optimal balance between diversity and similarity in societies: too little diversity and innovation dies from conformity; too much diversity and trust dies from fragmentation; maintaining the right 'healthy mix' is necessary to keep a society moving forward without becoming stagnant or chaotic.

There is a massive advantage in being willing to look like an idiot in the short term; people afraid of appearing foolish are locked into mediocrity; willingness to be visibly wrong, to ask naive questions, to fail publicly is correlated with growth.