Communication has been around ever since the dawn human being.
It has been achieved through writing, speaking, and every other approach necessary and possible to express one's opinions to another. The history of civilization tells us that an effective communication allows the communicator to successfully attain his or her agenda in a convincing manner. Among many, there are two points that the communicator must address and be mindful of, upon communicating.
First is the clarity of mind and intention. As long as the communicator has a lucid idea of what to share with what goal, he or she will then be able to find the right words and execute the rest. Second is the mindset to learn. I believe that one can become an effective communicator, if one is willing to learn how to write and speak.