Starting the car was normal and then failed without any warning, indicating an electrical problem.

It is either the starter switch, nuetral safety switch, or starter solenoid (unless you know of something else).

All electrical power appears normal (lights, etc.) and it will not start in any gear. The solenoid makes no clicking noise or any noise for that matter.

Unfortunately, I was not driving the car when this happened. I am told it was driven to a home and then parked. It would not start when attempting to leave. (I then towed it home.)