Believe it or not the "Modern Conservative" Nations of the world (Meaning we allow women to wear what they want, and dont kill them without penalty etc...) The most Conservative of the Modern nations are said to be the US, Ireland Italy and Poland.
Scary thought.
Why do you find this scary? Curious....
You forgot Austrailia
What about Portugal?
"The most Conservative of the Modern nations are said to be the US, Ireland Italy and Poland."
I gather that you are excluding all of Latin America from the definition of "modern nations". I think that's a mistake: Brazil and Mexico are both more important economically than Ireland or Poland, and they are certainly as modern.
Japan is certainly modern, and GRIMLY conservative in every sense.
But if we just confine "Modern Nations" to Europe and North America, then that list is probably true. Right behind them is probably Portugal. What they all have in common is that they're Catholic, except for the US. But what makes the US conservative is that it is religious, so there's a common thread running there.
Add Latin America to the list, and the whole continent is more conservative than the US or most countries in Europe. After all, abortion is illegal in every Latin American country except Cuba.