jerrylamos said: The Phoenicians and the Greeks with the alphabet were/are a huge advance in communication over the Egyptian hieroglyphs.
Icons are a true challenge IMHO. Creating an icon that really gets into people subconscious is not an easy task. And if the icon changes frequently, there's no way to succeed. It's exactly like designing a company logo. People that can do that are worth big money.
Some icons took decades to become part of our lives. Like, for example, see the icons of a stereo (Play, Stop, Pause, Rewind, FastForward, Previous, Next, etc) they can be printed at any media device / control, using mostly any styling, and yet most people will be able to identify them. They are regarded by some as the most successful icons ever created.
If you think about it, some OSs and applications still use text right below to the icon. No one really needs to read the text below Microsoft Word icon every day. But your brain sees the text a gazillion times, associates the text to it's meaning and to the icon, until the text its not necessary anymore. Then you can restyle the icon, etc, but people's brains are already familiar to that content.
The only Icons that are usually like that in a Linux distro (for me) are the one for Text Editor, Terminal, File Explorer, Calculator, etc. And that's because they are very similar to what they have been for all OSs during the last who knows how many years. We used those same icons, with different styling, in Windows 3.1 and OS/2, etc.
But when you think about the apps we have today on a distro, there's no way to create such strong icons, that will get imprinted in peoples brains. I mean, try to think of a strong and meaningful icon for every Linux app you use. It's hard. And, in parallel, there seems to be small effort in the sense of making icons endure throughout versions, and just change their styling.