It is often the developed countries that have the most oppressive and inflexible societies. For one, Japan work and production oriented society is well known among the psychology community to provide one of the most stressful environments in the world.
Another option could be that caucasians genes have more propensity to depression and self destruction.
The fact that Argentina, Uruguay and Chile, two Latin America countries with strong European influx have the highest suicide rates in south America doesn't help either.
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