If you asked a large number of people what the most important invention has been, many would say the printing press. Others might say the wheel. But even though it’s debatable whether the appearance of the printing press affects the course of history more than the wheel. The printing press ranks within the top two or three inventions in history. Long before the telephone, the TV, the radio and the computer, the written word was the only way to communicate ideas to people too far away to talk with. Until the sixth or seventh century, all books had to be written by hand. Creating a book was difficult, and in comparison with today, very few books existed. Therefore, very few people read books.”

Adapted from Top Noch.

According to the text, we can say that_____________.