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AP Photo/Michel Euler, File

Dick Costolo, the former CEO of Twitter, said today during the Upfront Summit in Los Angeles that he missed an opportunity to stop bullying on the platform. In short, it proved to be a very complicated problem ("lots of edge cases") and he got distracted by other things: Moreover, being a hired CEO rather than a founder made him less bold:

I wish I could turn back the clock and go back to 2010 and stop abuse on the platform by creating a very specific bar for how to behave on the platform... I take responsibility for not taking the bull by the horns.

Costolo added that social media bullying is a bit like tech's spam problem, in which you must make it more time-consuming and expensive to be the abuser than the abused. He also believes that dichotomy can extend to the "fake news" situation, and that Twitter should engage in manual curation that highlights authoritative voices rather than just hyperbolic ones.

Go deeper

Trump's coronavirus adviser Scott Atlas resigns

Photo: Nicholas Kamm/AFP via Getty

Scott Atlas, a controversial member of the White House coronavirus task force, handed in his resignation on Monday, according to three administration officials who discussed Atlas' resignation with Axios.

Why it matters: President Trump brought in Atlas as a counterpoint to NIAID director Anthony Fauci, whose warnings about the pandemic were dismissed by the Trump administration. With Trump now fixated on election fraud conspiracy theories, Atlas' detail comes to a natural end.

Dave Lawler, author of World
2 hours ago - World

Assassination in Iran sets stage for tense final 50 days of Trump

The funeral ceremony in Tehran. Photo: Iranian Defense Ministry via Getty

Iranian leaders are weighing their response to the assassination of Mohsen Fakhrizadeh, known as the father of Iran’s military nuclear program, who was given a state funeral Monday in Tehran.

The big picture: Iran has accused Israel of carrying out Friday’s attack, but senior leaders have suggested that they’ll choose patience over an immediate escalation that could play into the hands of the Israelis and the outgoing Trump administration.

Updated 4 hours ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Health: Hospital crisis deepens as holiday season nears.
  2. Vaccine: Moderna to file for FDA emergency use authorizationVaccinating rural America won't be easy — Being last in the vaccine queue is young people's next big COVID test.
  3. Politics: Bipartisan group of senators seeks stimulus dealChuck Grassley returns to Senate after recovering from COVID-19.
  4. States: Cuomo orders emergency hospital protocols as COVID capacity dwindles.
  5. Economy: Wall Street wonders how bad economy has to get for Congress to act.
  6. 🎧 Podcast: The state of play of the top vaccines.