He graduated from Athens College where he studied French philosophy. From 1954 to 1960, he studied philosophy at the University of Munich in Germany. He had already started writing, publishing his first book in 1953.

In 1962, he started working in advertising as a copywriter. In 1965, he founded his own company. Other than trading commercials, the company created goodwill ads and public initiatives (e.g. Den xechno for Cyprus). In 1983, he withdrew from all business ventures in order to work full time as a writer. In 1979, Dimou started writing columns for magazines, including Epikaira (Current Issues), 4Trochoi (4 Wheels) , Tetarto (Quarter) and Photographos (Photographer) and newspapers including To Vima, Kathimerini, Kyriakatiki Eleftherotypia and Ethnos tis Kyriakis.

Dimou was the first Greek writer to host talk shows on TV. He started in 1979 with Mia Tainia - Mia Syzitisi (A Movie - A Discussion). He returned in 1987 in a show called Dialogoi (Dialogues), in 1987. He also ran Peripeteies Ideon (Adventures of Ideas) in 1991, and Megales Parexigiseis (Big Misunderstandings) in 1999. As for radio, he was part of the team that founded Athens 98.4 FM. Later, he had a show in Trito Programma on Era Radio. He has won two journalist awards (Abdi İpekçi and Botsis). In 1997, he became an honorary citizen of Ermoupoli, his mother's hometown. Dimou was awarded the Dimitris Mitropoulos award in 2000.

Dimou has published over 60 books, including The misfortune of being Greek (Η δυστυχία του να είσαι Έλληνας), The New Greeks (Οι Νέοι Έλληνες), The Lost Social Class (Η Χαμένη Τάξη), Apology of an Anti-Hellene (Απολογία ενός Ανθέλληνα) etc.

He has done some photographic work, published two photo albums and has had three photo exhibitions.

He is currently a columnist in the Greek free press magazine LIFO.

During the European Parliament election in 2009 he was a candidate with the Greek party Drasi.

Other philosophical works include

Poetic books include

His works also include essays and aphorisms: