The document discusses how the meaning and importance of photography has changed over time. In the 19th century, photography required significant time and effort, so each photograph held purpose and meaning. By the 20th century, cameras had advanced technologically, reducing the effort needed for decent photos and making photography a more casual pastime. Now in the 21st century, digital cameras have made photography so easy that cultural understanding and technical skill no longer provide much advantage, further reducing photography's importance and meaning.