Without language or written history there would be nothing but trial and error and experience to learn from. And make the passing of knowledge nearly impossible. Written history, even that which is slanted, is an account of an event in history. These are clues and links to the past that we can reflect on and learn from. Without language, there would be no Bible, Quran, Torah, or other sacred text related to religions and cultural beliefs. Communicating would be difficult at best without words and gestures to assist.
Electricity is something that almost our entire world is dependent upon on a daily basis. Without electricity there would be no heat in the winter without fire or cool in the summer without water and a breeze. There would be no storage of perishable foods in a refrigerator or freezer, no lights to guide your way home and many other things we take for granted. Being this dependent on it means it is critical to our current way of life and we wouldn’t be here without it.
Telecommunications is a large field that covers a broad array of products and services. I have to say it started with the telegraph and has lead to the internet. Everything in between was a leap for industries and individuals alike. Think of the telephone, how greatly did this one device enhance our ability to communicate with those we wanted or needed to? The fax, a copy of a document that is broken up into tiny non visible pieces and fed to a machine on the other side that recreates the image, that’s amazing but truly common in today’s thinking.