It found the main factors accounting for internal peace were income, extent of schooling and level of regional integration. No single common factor accounted for the ranking for external peace.
It found the main factors accounting for internal peace were income, extent of schooling and level of regional integration. No single common factor accounted for the ranking for external peace.
研究还发现，促成国内和平的主要因素是收入、受教育范围和地区一体化水平。对于外部和平，没有单一影响排名的共同因素。