The Rome empire was the first believed empire to exist
A) people lost their jobs because of new technology. If anything people would gain jobs more than they would lose them because of a technology that technically talks to you. It just makes no sense to lose your job because of a radio.
The Egyptians failed to adapt to the new changes of their world. There are multiple books on this and it is very interesting.
I'm pretty sure it was to get revenge on the Persians for their attack on the Greek people
