Claim: On Photography by Susan Sontag, an American writer and philosopher, dealt with the consequences of photography on people's thinking.
Evidence: On Photography is a 1977 collection of essays by Susan Sontag. Susan Sontag (/ˈsɒntæɡ/; January 16, 1933 – December 28, 2004) was an American writer, filmmaker, philosopher, teacher, and political activist. Among the consequences of photography is that the meaning of all events is leveled and made equal. Sontag argues that the proliferation of photographic images had begun to establish within people a "chronic voyeuristic relation" to the world around them.