Third Culture Christians

Thousands of children live with their parents overseas. There's a phrase for them: They're Third Culture Kids.

Where are you from?

It's a common question asked at parties or anytime strangers get together. In a world that's increasingly mobile and increasingly global, however, it's a question that's a lot more complex than it used to be.

According to a Pew Research study, six in 10 Americans have moved to a new community at least once in their lives, and the definition of where one's "home" is has become more fluid. For example, 38 percent of Americans do not consider the place they are now living to be "home." Some consider "home" to be where they were born and raised. Others say it's where they lived the longest, where their family comes from or where they went to high school.

And if there's domestic confusion about "home," it's even more apparent in the highly globalized world where international travel and living abroad is now quite common. Whereas previous generations tended to stay put unless someone was in the military, the foreign service or on the mission field, emerging generations in...