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The five most valuable companies in the U.S. are all technology firms that employ far fewer workers than their industrial predecessors.

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Data: Yahoo Finance, 2016 annual reports; Chart: Andrew Witherspoon / Axios

Why this matters: These companies symbolize the central issue of employment in a new age of technology, automation and artificial intelligence. For example, Ford, worth a tenth of Facebook, employs 200,000 workers compared with Facebook's 17,000. Worse, Ford is cutting jobs, saying last month that it will lay off 1400 workers despite record revenues.

Accelerating economic change: The success of these tech giants highlights the changing face of corporate America -- three of them did not exist 25 years ago, and the other two are just 40. That such relatively young companies are on top illustrates the trend of a higher churn rate among American companies. According to consultancy Innosight, the 33-year average tenure of companies on the S&P 500 in 1965 narrowed to 20 years in 1990 and is forecast to shrink to 14 years by 2026.

Go deeper

Ipsos poll: Support growing for abortion rights in Latin America

Members of feminist groups in Saltillo, Mexico, after the decriminalization of abortion was approved in Coahuila, Mexico. Photo: Antonio Ojeda/Agencia Press South/Getty Images

Support for abortion rights in some Latin American countries has jumped considerably since 2014, with Argentina seeing the biggest shift, an Ipsos poll finds.

The big picture: The view that abortion should be permitted at least under certain circumstances is held by a majority of adults surveyed in Argentina, Brazil, Chile, Colombia, Mexico and Peru.

Biden claims "era of relentless war" is over in first UN speech

Photo: Eduardo Munoz/PoolL/AFP via Getty Images

Addressing the UN General Assembly for the first time since taking office, President Biden laid out his vision for how the U.S. will confront what he characterized as a "decisive" next decade in human history.

Why it matters: In the face of unprecedented global challenges — the pandemic, climate change, rising authoritarianism — Biden made a case for multilateralism, democratic values, the rule of law and empathy for common struggles.

Treasury sanctions cryptocurrency exchange over ransomware transactions

Treasury Secretary Janet Yellen during a congressional hearing in June. Photo: Greg Nash/The Hill/Bloomberg via Getty Images

The Department of the Treasury announced Tuesday it will sanction cryptocurrency exchange SUEX for allegedly facilitating financial transactions for multiple ransomware actors.

Why it matters: The sanctions, the first against a cryptocurrency exchange platform, are part of the Biden administration's crackdown on ransomware in response to several high-profile cyberattacks this year.