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Marjory Stoneman Douglas students Cameron Kasky, Alex Wind, Emma Gonzalez, David Hogg, and Jaclyn Corin. Photo: Larry French/Getty Images for SiriusXM

FORTUNE editor-in-chief Clifton Leaf introduces the magazine's annual list of the World's 50 Greatest Leaders: “If 2018 becomes the year that the United States finally begins to tackle its disease of gun violence ... it will be due not to the good sense of elected officials, but rather to the courage, tenacity, and sheer eloquence of students."

The top five: The students of Marjory Stoneman Douglas and other schools; Bill and Melinda Gates, cofounders, The Gates Foundation; The #MeToo Movement; South Korean President Moon Jae-in; and Ken Frazier, Merck CEO.

  • Others: 7. Margrethe Vestager, Europe's antitrust chief ... 8. Larry Fink, BlackRock CEO ... 9. Gen. Joseph Dunford, Chairman of the Joint Chiefs of Staff ... 11. Mary Barra, GM CEO .... 12. Nick Saban, University of Alabama football coach.
  • 14. Tim Cook, Apple CEO ... 15. Serena Williams ... 18. Ryan Coogler, film director ... 21. Marc Benioff, Salesforce CEO ... 22. U.S. gymnasts and their allies ... 23. Kathleen McLaughlin, Walmart chief sustainability officer ... 27. Oprah ... 28. Mitch Landrieu, New Orleans mayor ... 31. West Virginia teachers.
  • 33. Jamie Dimon, JPMorgan Chase CEO ... 35. Reese Witherspoon ... 41. Tim Keller, evangelical minister ... 42.Gwynne Shotwell, SpaceX president and COO ... 49. Amy Gutmann, University of Pennsylvania president ... 50. Ed Bastian, Delta CEO.

Go deeper

2 hours ago - World

Iran rejects nuclear talks with U.S., for now

Iranian Foreign Minister Javad Zarif at Iran/EU talks in 2015. Photo: Carlos Barria/POOL/AFP via Getty

A spokesman for Iran’s Foreign Ministry said on Sunday that conditions are not ripe for informal nuclear talks between Iran, the U.S. and other world powers.

Why it matters: The Biden administration had proposed the talks as part of its efforts to negotiate a path back to the 2015 nuclear deal. The White House expressed disappointment with Iran's response, but said it remained willing to engage with Tehran.

2 hours ago - Health

U.S. sets weekend records for daily COVID vaccinations

A driver waits to receive the Pfizer-BioNTech Covid-19 vaccine in Inglewood, California on Feb. 26. Photo: Eric Thayer/Bloomberg via Getty Images

Just over 2.4 million coronavirus vaccinations were reported to the CDC on Sunday, matching Saturday's record-high for inoculations as seen in Bloomberg's vaccine tracker.

Why it matters: Vaccinations are ramping up again after widespread delays caused by historic winter storms. Over 75 million vaccine doses have been administered thus far, with 7.5% of the population fully vaccinated and 15% having received at least one dose.

GOP Sen. Bill Cassidy: "We will lose" if we continue to idolize Trump

Sen. Bill Cassidy (R-La.) told CNN's "State of the Union" Sunday he does not believe that former President Trump will, or should, be the Republican nominee for president in 2024.

What he's saying: Cassidy pointed out that "over the last four years, [Republicans] lost the House of Representatives, the Senate and the presidency. That has not happened ... since Herbert Hoover."