Skip to Content

Were people really happier in the past? Millions of pieces of text suggest not.

October 14, 2019
People smiling in a ring, while putting their hands into the middle
People smiling in a ring, while putting their hands into the middleGetty Images

Ever wondered whether people were happier in the past? We now have a much better idea, thanks to a new technique that involves analyzing the sentiment behind the words used in millions of pieces of text over the last 200 years. (And the answer is: people in the US are probably happier now than they’ve ever been, despite what you might think.)

The study: A team of researchers, led by Thomas Hills at the University of Warwick, analyzed 8 million books and 65 million newspaper articles published between 1820 and 2009. They assigned happiness scores to thousands of words in different languages and then calculated the relative proportion of positive and negative language for the four different countries.

These scores were used to create historical happiness indices for the UK, the US, Germany, and Italy. The researchers took into account the fact that certain words change their meaning over time (gay, for example). The collection was drawn from Google Books, and it represents a digitized record of more than 6% of all books ever published. The method was validated by comparing the findings with survey data on well-being from the 1970s, collected through about 1,000 face-to-face interviews each year in every European Union country (the Eurobarometer). Their study is published in Nature Human Behavior today. 

The findings: There is an awful lot of data to work through, and the findings probably won’t be hugely surprising to anyone with a decent grasp of world history (both world wars made people generally very unhappy, for example). The low point of happiness in the US was around the time of the Fall of Saigon in 1975, while for the UK it was the Winter of Discontent of 1978-79, when there were widespread public sector strikes.  

The big picture: New ways to measure well-being and happiness could help to inform national policies. The UK’s statistics authority, for example, has been measuring levels of national well-being since 2010. And this year New Zealand included national well-being as an official metric in its economic planning. Using written material to provide historical context could prove invaluable to the fledgling discipline. 

Sign up here for our daily newsletter The Download to get your dose of the latest must-read news from the world of emerging tech.

Deep Dive


What happened to the microfinance organization Kiva?

A group of strikers argue that the organization seems more focused on making money than creating change. Are they right?

Six ways that AI could change politics

A new era of AI-powered domestic politics may be coming. Watch for these milestones to know when it’s arrived.

Cryptography may offer a solution to the massive AI-labeling problem 

An internet protocol called C2PA adds a “nutrition label” to images, video, and audio.

Stay connected

Illustration by Rose Wong

Get the latest updates from
MIT Technology Review

Discover special offers, top stories, upcoming events, and more.

Thank you for submitting your email!

Explore more newsletters

It looks like something went wrong.

We’re having trouble saving your preferences. Try refreshing this page and updating them one more time. If you continue to get this message, reach out to us at with a list of newsletters you’d like to receive.