54 authors — O

Orlando Figes is a British historian and professor known for his works on Russian history, including 'A People's Tragedy' and 'Natasha's Dance'.

Orson Scott Card is an American author known for his works in science fiction, fantasy, and speculative fiction.

Oscar Trimboli is an Australian author, speaker, and leadership coach known for his work on communication and listening.

Oscar Wilde (1854–1900) was an Irish poet, playwright, and novelist known for his wit, flamboyant style, and sharp social commentary.

Osho (1931–1990), born Chandra Mohan Jain, was an Indian mystic and spiritual teacher known for his teachings on meditation, love, and consciousness.

Ottessa Moshfegh is an American author known for her sharp, darkly humorous, and psychologically incisive fiction.

C.

Ovid (Publius Ovidius Naso, 43 BCE–17/18 CE) was a Roman poet of the Augustan age, celebrated for his elegiac works such as Amores, Ars Amatoria, and Metamorphoses.

Owain Service served as Chief Executive of the UK's Behavioural Insights Team (BIT), specializing in applying behavioral economics to public policy.

Owain Service served as Chief Executive of the UK's Behavioural Insights Team (BIT), specializing in applying behavioral economics to public policy.

The authors are members of the Earth4All initiative and the Club of Rome, including economists, scientists, and sustainability experts such as Sandrine Dixson-Declève, Owen Gaffney, Jayati Ghosh, Jørgen Randers, and Per Espen Stoknes, who have long worked on global sustainability and systems transformation.

Ozan Varol is a former rocket scientist turned law professor and author.

Ozzie Zehner is an American author, researcher, and lecturer known for his critical perspectives on energy policy and environmentalism.

Ozzy Osbourne is an English singer, songwriter, and television personality, best known as the lead vocalist of the pioneering heavy metal band Black Sabbath.