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- Chris Abani
- J.J. Abrams
- Jose Antonio Abreu
- Jamil Abu-Wardeh
- Shawn Achor
- Christoph Adami
- Douglas Adams
- Newton Aduaka
- Anand Agarawala
- Shai Agassi
- Ravin Agrawal
- Blaise Aguera y Arcas
- David Agus
- Omar Ahmad
- Erez Lieberman Aiden
- Mustafa Akyol
- Sheikha Al Mayassa
- Naif Al-Mutawa
- Nadia Al-Sakkaf
- Madeleine Albright
- Pete Alcorn
- Zeresenay Alemseged
- Rufus Griscom + Alisa Volkman
- Isabel Allende
- Kevin Allocca
- Anil Ananthaswamy
- Charles Anderson
- Ray Anderson
- Kelli Anderson
- Chris Anderson (TED)
- Chris Anderson (Wired)
- Paola Antonelli
- Dan Ariely
- Rachel Armstrong
- Karen Armstrong
- Jessi Arrington
- Yann Arthus-Bertrand
- Onyx Ashanti
- Kristen Ashburn
- Paddy Ashdown
- Julian Assange
- Anthony Atala
- Patrick Awuah
- George Ayittey
- Bruce Aylward