Time - International (2019-12-02)

Most ideas exit

the zeitgeist as quickly

as they enter. The

ones that last tend

to offer something new:

a powerful argument,

a fresh perspective,

a sign of things to come.

From political crises to

technological revolutions,

from fast food to fashion,

the ideas that shaped this

year are wildly different.

But odds are you’ve had

a conversation—maybe

even a debate—about

at least one of them.

Likely more.