What trait of a society can prevent cultural blending?

Static societies can not benefit from cultural blending because they are not open to change. Such societies also are not open to new ideas.

It is beleived that the Arab pennisula was a sphere of scientific inventions. This got lost when the societies a new phase of closing to themselves. This has led to some scholars postulating that the arab pennisular stopped developing when they stopped learning from others.

Italy had political stability, wealth, and trade.