Friedrich Wilhelm Nietzsche was a German philosopher and writer who started his career as a classical philologist and turned to philosophy early in his academic career.

Marcus Aurelius (April 26, 121 CE – March 17, 180 CE) was a Roman Emperor (161–180 CE) born into a wealthy patrician family in Rome. Raised by his mother and paternal grandfather after his father's death, he is best known for his *Meditations*, a series of private writings on Stoic philosophy that remain a key source for understanding ancient Stoicism.

The School of Life is a British multinational publishing and education company founded in 2008 by British author and public speaker Alain de Botton.

Yuval Noah Harari is an Israeli medievalist, military historian, public intellectual, and popular science writer.

Miguel Ángel Ruiz Macías, better known as Don Miguel Ruiz, is a Mexican author of Toltec spiritual and personal development texts..

Lucius Annaeus Seneca the Elder, also known as Seneca the Rhetorician, was a Roman writer, born of a wealthy equestrian family of Corduba, Hispania.