The gap between the richest and the poorest countries has widened dramatically during the past century.
Yet as temperatures warmed during the past century, malaria became virtually unheard of outside of equatorial regions.
The growth in centenarianism reflects the huge leaps in life expectancy made in the West during the past century.
Global warming alarmists claim temperature rise during the past century was unprecedented, with temperatures rising especially rapidly during the latter half of the 20th century.
It is true that there have been immense improvements in material conditions during the past century, but they are quite external and they leave man's fundamental nature no better than it was before.
Of course, the U.S. has experienced many severe droughts during the past century, including the Dust Bowl that produced major ecological and agricultural damage throughout American and Canadian prairies from 1930-36 (and in some areas, until 1940).
The team has calculated that Alaskan glaciers are responsible for at least 9% of the global sea-level rise during the past century, and Alaska's glaciers raise the level of Earth's oceans by more than one-tenth of a millimetre each year.
The sequencing of various genomes during the past quarter century reveals that nature has been remarkably conservative about using and maintaining efficient molecules as they evolved.
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National Hurricane Center data show a dramatic decline in major hurricanes striking the United States during the past half century (see my recent column on this here).
According to a study led by two Stanford University scientists and published earlier this year, advances in high-yield agriculture during the past half-century have prevented massive amounts of greenhouse gases--the equivalent of 590 billion metric tons of carbon dioxide--from entering the atmosphere.
Yet these pro-growth policies have been associated with the most successful American economic recoveries of the past century, during the 1920s, the 1960s and the 1980s.
Whereas tangible assets like plant and equipment drove a company's value during much of the past century, intangible assets such as brands, patents and trademarks are what create value today.
The point is that there have been precious few moments over the past century during which both sides have embraced the idea of two states at the same time.
Globally the average fertility rate (the number of children a woman can expect during her lifetime) has roughly halved in the past half century, from five in the mid-1950s to 2.5.
Since the U.S. federal income tax was first adopted in 1913, marginal tax rates on the top 1% of income earners have ranged from a low of 7% (initially) to a high of 94% (during WWII), and have averaged 61% for the past century.
The frequency of major hurricane strikes during the past several decades is only two-thirds the frequency of major hurricane strikes during the first half of the twentieth century.
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