President Barack Obama left office and Donald Trump entered the White House. There were dozens of school shootings and natural disasters. We witnessed the rise of streaming services, influencers, podcasts — and the demise of free time itself (thanks to smartphones). There were royal weddings and the launch of the #MeToo movement.

We want to hear from you: What do you think is the biggest story of the 2010s? We'll be rounding up your responses ahead of the New Year and sharing them on NBCNews.com.