No predominantly non-Christian countries currently permit same-sex couples to marry. However, these countries recognize same-sex marriage performed elsewhere (in chronological order):
No predominantly Muslim countries have legalized same-sex marriage.
No countries in the Balkans have legalized same-sex marriage.
Currently, these predominantly Portuguese-speaking countries permit same-sex couples to marry (in chronological order):Portugal (June 5, 2010); and,Brazil (May 14, 2013, although some states started earlier).
The countries that have legalized same-sex marriage did so because the legislature came to the conclusion that the government had no legitimate or compelling reason to deny marriage rights to same-sex couples.
Luxembourg is the wealthiest country on earth to have legalized same-sex marriage, when wealth is defined as highest per capita gross domestic product.
Brazil is the poorest country on earth to have legalized same-sex marriage when "poor" is understood to mean having the lowest per capita gross domestic product.
Heres is a list of the richest countries showing whether they have legalized same-sex marriage.QatarLuxembourgSingaporeNorway - LEGALBruneiUnited States - PARTIALLY LEGALHong KongSwitzerlandSan MarinoCanada - LEGALAustraliaAustriaNetherlands - LEGALIrelandSweden - LEGALKuwaitIceland - LEGALGermanyTaiwanBelgium - LEGALDenmark - LEGALUnited Kingdom - PARTIALLY LEGALJapanFinlandFrance - LEGALIsraelSouth KoreaBahamasSaudi ArabiaSpain - LEGALItalyNew Zealand - LEGALGiven how few countries have legalized same-sex marriage, it does appear that many are among the richest countries on earth. Incidentally, the poorest country to have legalized same-sex marriage is Brazil, which ranks 81st out of almost 200 countries. So it appears that ALL countries that have legalized same-sex marriage are in the upper half according to wealth.
No countries in North Africa have legalized same-sex marriage.
No countries in Eastern Europe have legalized same-sex marriage.
Some states and countries have legalized same-sex marriage. Some states and countries have banned same-sex marriage by statute and some by amending their constitutions.
Other countries have amended their constitutions to ban same-sex marriage. However, no other country has first legalized same-sex marriage, then banned it. Furthermore, no other country has first legalized same-sex marriage, then banned it, then repealed the ban. Maine legalized same-sex marriage and then repealed that law before the law went into effect. That is the most similar case.
The states and countries that have legalized same-sex marriage have not reported any negative effects.