Readers discuss the Trump administration’s National Security Strategy. Also: Hollywood and culture; fighting in a family.

Readers respond to Michelle Cottle’s essay about her experience with her parents and the growing caregiver crisis.

A decade after the end of the one-child policy, China has over 30 million so-called surplus men. Can this dating boot camp help them find love?

There’s good evidence that learning to live with your loved ones just as they are leads to more happiness for you.

Caregivers are at the brink of despair.