Bill Gates says this new book is his all-time favorite — and it reveals a striking change in the death risks Americans face

  • Bill Gates' new favorite book is "Enlightenment Now" by Steven Pinker.

  • Pinker's book makes a case that rational thought and scientific inquiry are constantly improving the world.

  • We're living in the safest era of human history, according to Pinker's analysis.

Bill Gates' favorite author recently published a new book — and Gates has already called it his "favorite book of all time," on his blog.

Steven Pinker is a professor of psychology at Harvard and the author of countless popular science titles. His newest book, "Enlightenment Now," takes a sweeping look a history and comes to the optimistic conclusion that we are living in the most peaceful era humans have ever enjoyed.

The best books according to Bill Gates:

He analyzes 15 different indicators, like literacy, quality of life, and safety, and compares data to show how these have changed over time.

Despite the doom and gloom we often see within the news, Pinker's findings are astounding. By all the measures he looks at, humans are much safer than we ever were before.

First, according to Pinker, Americans are 95% less likely to be killed on the job, owing to a shift from industrial manufacturing to a more knowledge-based economy, as well as improved engineering and regulations for businesses.

To put that in perspective, 20,000 people died on the job in the US every day in 1929. Today, that number is around 5,000 — with a population well over three times larger.

Beyond job-related deaths, Americans are also 96% less likely to be killed in a car accident, 99% less likely to die in a plane crash, and 92% less likely to die in a fire, than a century ago.

Humans are also 37 times less likely to die getting struck by lightning than 100 years ago — owing to improvements in weather forecasting, communication, and a greater proportion of people living in cities.

In his book, Pinker highlights other statistics that suggest significant social improvement worldwide. The average time it took people to wash laundry each week, for example, has fallen from 11.5 hours to just 1.5 hours in the past 100 years according to his analysis. Pinker argues that the time saved has freed up more people to pursue hobbies — or enter the workforce.

Average IQ scores are also rising by about 3 points per decade, according to Pinker. That's because of better nutrition and education, as well as what Pinker says is modern society's emphasis on "abstract thinking," like the ability to navigate through a dense city or having a powerful computer in your pocket.

Pinker's book serves as an antidote to the never-ending news cycle. As Gates wrote in his blog, "The world is getting better, even if it doesn’t always feel that way."

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