Time.com
MY ACCOUNT
SIGN IN
SIGN OUT
-->
SUBSCRIBE
SUBSCRIBE
Home
U.S.
Politics
World
Business
Tech
Health
TIME Health
Entertainment
Science
Newsfeed
Living
Sports
History
The TIME Vault
Magazine
Ideas
TIME Labs
Photography
Videos
The Goods
Press Room
The 100 Most Influential People
Next Generation Leaders
Person of the Year
Top of the World
Subscribe
Newsletters
Feedback
Privacy Policy
Your California Privacy Rights
Terms of Use
Ad Choices
RSS
TIME Apps
TIME for Kids
Advertising
Reprints and Permissions
Site Map
Help
Customer Service
© 2019 TIME USA, LLC. All rights reserved.
Subscribe
Subscribe
Where Optimism Lives
Digg
Facebook
Twitter
Linkedin
Email
Related
The Optimism Bias
More Graphics »