It is easy to imagine that throughout history the ideas of original inventors were sufficient to start off some new development. However, it is obvious on deeper reflection that the inventions themselves, as well as those who produced them, would be bound to fail if there was no need, demand, or social basis for the ideas. There are many sources of resistance to change. Perhaps the most significant is that many people are afraid of new ideas. They may feel threatened by new ideas and fear that they will not be able to cope with a change in working patterns that is demanded of them or that they will not understand how to use a new technology. The key to effecting change is to involve people in the process early, to consult them and to get them to take ownership for themselves of the new ideas that are to be introduced.