International Poll: Majority supports marriage

When it comes to developed countries, there is robust support for equality.

"What we see is that in every one of the 16 countries we surveyed, there is a majority in favor of allowing same sex couples to have some sort of legal recognition," said Nicolas Boyon, an Ipsos senior vice president. 

"In nine out of 16 countries we see an outright majority in favor of full marriage equality," he added. 

Nearly 60 percent of people polled thought gay couples should have the same rights as heterosexuals to adopt children and 64 percent thought same-sex couples were just as likely to raise children successfully.