"The “Danish coziness” philosophy is fast becoming the new “French living” in terms of aspirational lifestyle books and blogs. There are countless viral articles comparing the happiness levels of Americans versus Danes. Their homes are more homey; their people are more cheerful. It’s an attitude that defies definition, but there is a name for this slow-moving, stress-free mindset: hygge (pronounced “hoo-ga”). Hygge values the idea of...