Societies facing a host of dangers are more likely to have strict social norms and be intolerant of people who deviate from them. The more secure a society, the more liberal and tolerant its people.
To find out how strict social norms are in different places, Michele Gelfand of the University of Maryland in College Park, and colleagues, surveyed 6800 people in 33 countries. They used the results to give each country a "tightness" figure, reflecting how many social norms there were and how strictly they were enforced.
"Tight" countries like India and South Korea had more and stricter social norms than "loose" countries like the Netherlands and Estonia. [Tight countries] were more likely to condemn prostitution, abortion, divorce, cheating, avoiding a fare on public transport and accepting a bribe. There was less diversity of opinion, religion was more prominent, and their governments were more autocratic.
Gelfand then pulled together data on the threats each country faced from high population density, shortages of food and clean water, pollution, natural disasters, diseases and hostile neighbours. All of these threats were more prevalent in tight countries.
Becoming socially tight may be a healthy response to threats, Gelfand says. She suggests that an embattled society might have a better chance of surviving if it became tighter.
But that doesn't necessarily follow, says Randy Thornhill of the University of New Mexico in Albuquerque. He says it is not obvious that conformity would be a defence against so many different threats.
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