Because the form of government they picked allowed for people to show opinion freely and a free vote
The immediate effects are easy. Miles of city would be leveled and all inhabitants of that area would be almost instantly killed. The long-term effects would be there would be so much radiation your body could go through nasty mutation and you'd need to be treated if you survived but if don't survive you'd have a long agonizing death. Also all neighboring cities would have radiation surging through them.
The answer to what is not a contributing factor to the Phoenicians becoming a great seafaring civilization is a location next to the mountains. The Levant area where Phoenicians city states were concentrated was rich in natural resources. The location next to the Mediterranean Sea and the ample supply of lumber for ship building made the city states of Phoenicia a great trading civilization.
