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{{short description|Mexican mathematician}} |nationality=Mexican ...

...the human population will begin to decline in the second half of the 21st century.<ref>{{Cite news |last1=Cave |first1=Damien |last2=Bubola |first2=Emma |las ...s, broken down by continents, were published in the first half of the 19th century, at 600 million to 1&nbsp;billion in the early 1800s and 800&nbsp;million t ...

...s Report, 25 February 1993</ref><ref name="RebeccaLeung"/> and a twentieth-century trend toward smaller families in developed countries continued.<ref>{{cite ...adults and children was much smaller than it is in the early twenty-first century. Between 1953 and 2006, adult gains on the vocabulary subtest of the [[Wech ...

...Charles Tilly]]). Almost all socialist countries that appeared in the 20th century arose out of wars. In a surreal desert scene from the movie [[The Mexican]], Jerry Welbach (played by [[Brad Pitt]]) approaches a solitary traffic li ...