In an essay reminiscent of key arguments advanced by the Rational Optimist, Marian Tupy of the Cato Institute reminds us just how much our lives have improved.

Today, most Americans are concerned with eating too much rather than too little. That fact is all the more remarkable considering that between 1600 and 2013 the population of what would later become the United States rose 21,000%, while the proportion of Americans employed in agriculture decreased at least 98%.

Contemporary Americans live longer, healthier, richer and safer lives than at any other period in history. In fact, an ordinary person today lives better than most kings of yesteryear.

To appreciate the astonishing improvements in the standards of living of ordinary people, consider the life of the 17th century’s grandest figure, Louis XIV. The Sun King ruled France and Navarre between 1643 and 1715. During his life, Louis became synonymous with wealth and power. His Versailles palace had 2,000 windows, 700 rooms, 1,250 chimneys and 67 staircases and cost, at a minimum, $3.2 billion in today’s dollars.

Yet here was a man who almost died of smallpox when he was 9 years old and lost nearly all of his legitimate heirs — his son, a grandson and a great-grandson — along with his younger brother, another grandson and a great-grandson, to smallpox. Eventually, he was succeeded by his second great-grandson, who became Louis XV and died (you guessed it) of smallpox.

In America, smallpox is usually associated with the decimation of Native Americans, but Europeans were not immune to the disease. As late as the 18th century, for example, smallpox killed about 400,000 Europeans annually. The overall mortality rate was 20% to 60%. Among infants, it was more than 80% and was one of the reasons for the low overall life expectancy of 20 to 30 years. The disease was eradicated in 1980. Today, we don’t think of smallpox any more than we think of the bubonic plague, which, in five short years, killed almost one-third of all Europeans in the 14th century.