Home BiologyThe Science behind the Countries With The Longest Life Expectancies
BiologyBy Joe Burgett -

The Science behind the Countries With The Longest Life Expectancies
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  • Male Life Expectancy: 82.08
  • Female Life Expectancy: 85.80
  • Life Expectancy Age Overall: 83.94
  • Population: 25.5 Million

The only country on this list that also serves as its own continent, Australia is quite a unique place. Due to when Australia broke apart from Pangea among other continental shifts, Australia became a land of complete uniqueness. Many animals native to Australia are only found there, in the wild at least. Yet people eventually came to the land, wiping out some animal populations over time. Then the English came in, which changed literally everything.

Part of the Commonwealth, Australia has the world’s 12th largest economy, with the 10th highest per capita income. They seem to allow for more immigration than other nations, as immigrants account for up to 30% of their total population. The Aussies rank high in quality of life, education, economic freedom, civil liberties, political rights, and health. Guns were mostly banned here a few decades ago, which brought violent and deadly crime rates down dramatically. This could be why they are one of the countries with the best life expectancies. Yet it could also be their universal healthcare too. Who’s to say?

The Science behind the Countries With The Longest Life Expectancies
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  • Male Life Expectancy: 81.27
  • Female Life Expectancy: 86.68
  • Life Expectancy Age Overall: 83.99
  • Population: 46.8 Million

Spain has had their fingers in a lot of pies around the world. They funded several expeditions to the New World, grabbing land in both American continents. They conquered and ruled landed all over Europe, Asia, and Africa. When the Roman Empire fell, Spain was up for grabs by hungry conquering bodies. By the 16th century, the Kingdom of Spain cropped up and ran through the 19th century. At that time, it was one of the largest empires in world history. A true global powerhouse.

Today, they are a secular parliamentary democracy and a constitutional monarchy. Currently, King Felipe VI is the head of state but other political heads are elected. They have the 14th largest economy on the planet and are well-known for their medical prowess. The World Health Organization ranks its healthcare system as the 7th best in the world. While both public and private healthcare exists, all public healthcare is free to citizens. This is what landed them on our list of the countries with the best life expectancies.

The Science behind the Countries With The Longest Life Expectancies
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  • Male Life Expectancy: 81.90
  • Female Life Expectancy: 85.97
  • Life Expectancy Age Overall: 84.01
  • Population: 60.5 Million

When you discuss world history, it is impossible to cover it without mentioning Italy. The dominating Roman Empire was so impactful that it is even mentioned in holy scriptures. Some of the most well-known historic figures, inventors, artists, scientists, and explorers come from Italy. A lot has changed throughout history here, but in the end, the country still stands as one of the world’s most important nations.

Today, they have one of the best economies on the planet, the 8th largest by GDP. They also have the 6th largest national wealth and the 3rd largest central bank gold reserve. Italy also ranks highly in quality of life, healthcare, and education. While they have some of the best universities in the world, the amount of people attending is below other nations. Regarding healthcare, it has been free for all citizens since 1978. Since 2000, Italy has ranked Top 5 in best healthcare and spent most of that time at the #2 position. This is why they are one of the countries with the best life expectancies.

The Science behind the Countries With The Longest Life Expectancies
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  • Male Life Expectancy: 82.42
  • Female Life Expectancy: 86.02
  • Life Expectancy Age Overall: 84.25
  • Population: 8.7 Million

Most people know Switzerland best for being neutral in world conflicts. The Swiss are great at this, and it’s really tough to invade them too. Those hills and mountain ranges are unforgiving, as Nazi Germany realized the hard way. They do not mind helping others, however. After all, this is the birthplace of the Red Cross. Check out the Swiss flag and Red Cross logo when you get a chance. The educational system in Switzerland is terrific, as it ranks 3rd best on the planet.

Many grow up learning at least 4 languages due to different regions using a specific one. Those languages are Italian, German, French, and Romansh. Several learn English as well. The Swiss are also known for some terrific culinary materials like wine, cheese, and chocolate. They also make amazing watches. This could be why they have the 8th highest per capita GDP. Three of their cities (Zürich, Geneva, and Basel) rank high in quality of life. Oh yeah, and Switzerland provides free universal healthcare for all citizens. Even immigrants can use it within three months of taking up residence here.

The Science behind the Countries With The Longest Life Expectancies
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  • Male Life Expectancy: 81.91
  • Female Life Expectancy: 88.09
  • Life Expectancy Age Overall: 85.03
  • Population: 126.5 Million

Japanese culture and history are incredibly well-known. From the era of the Samauri to the major Japanese Empire overall, all the way to its hunt for oil that cost them terribly during World War I. While an enemy to the West for quite a long time, today, Japan is on good terms with pretty much everyone. They are a beacon of technological, educational, and medical progress that has helped to literally change the planet.

By 1990, Japan had the second-largest economy on the planet. Today, it ranks third by GDP. Obviously, they have businesses connected to several areas. This includes the automotive industry, as well as industries that make televisions, phones, and of course video games/video game systems. They have the seventh-ranked education system and tenth in healthcare. Japan also provides free universal healthcare to not only citizens but any visiting foreigner and immigrant too. It’s pretty obvious to see how they are among the countries with the best life expectancies.

The Science behind the Countries With The Longest Life Expectancies
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Hong Kong

  • Average Male Age: 82.38
  • Average Female Age: 88.17
  • The Average Age Overall: 85.29
  • Population: 7.5 Million

Hong Kong, to us, still operates as a distinct nation unto itself. In spite of the attempts made by China. A lot of this controversy started when many years ago, Great Britain made Hong Kong a British colony. The Qing Empire gave up Hong Kong Island to the British in the mid-1800s. British Hong Kong was then occupied by Japan in the 1940s, but Japan surrendered it. By 1997, the British gave it up to China who then made it a “special administrative region.” Yet they maintained complete control over their governing and economic systems.

China seemed to be fine with this until the last number of years, where they have tried to cause problems. This is due to the economic impressiveness of the region that has become one of the world’s largest commercial ports and financial centers. They offer free trade and low taxes, making it perfect for business. Hong Kong is currently second in global education rankings and eighth in healthcare rankings. Public healthcare is mostly free in Hong Kong, but some stuff requires a small fee. It’s pretty obvious why Hong Kong takes the top spot among countries with the best life expectancies.

The Science behind the Countries With The Longest Life Expectancies
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Nations Cut For Population

We had to cut some countries or territories out due to not meeting our 5 million population quota. Among them were some smaller places like the Channel Islands, Macao, Cyprus, Guadeloupe, Réunion, Puerto Rico, French Guiana, Malta, Qatar, Guam, Maldives, Martinique, and the U.S. Virgin Islands.

Yet others that are well-known on a global scale also missed the cut like Iceland, Ireland, Slovenia, Singapore, Luxembourg, and New Zealand. While a few of the above nations were close to this 5 million population barrier, we made the rules and decided to stick with them. However, we should say that Macao, Singapore, Channel Islands, and Iceland were in the top ten countries with the best life expectancies list for most sources.

Where did we find this stuff? Here are our sources:

National Institutes of Health

Centers for Disease Control (CDC)

Organization for Economic Co-operation and Development (OECD)

Human Development Index

United Nations

Global Financial Centres Index (GFCI)

World Health Organization


World Population Review


Science Direct

Commonwealth Fund

The Guardian

USA Today