I can't speak about Rome or the like. What I can speak on is what I've researched regarding my projects. In my fictional example based on research, hi altitude nuclear airbursts could take down power grids temporarily. Things like your computer, cell phones, even cars would likely not be affected...
But, the worst part is, folks will expect a rapid recovery which will NOT happen. So, they don't plan, and if you don't plan, you run out.
With just-in-time supply chains (as we have seen during the pandemic), since items aren't stockpiled they need to be produced. To be produced a phone call at the least needs to be made and received. The phone and computer itself might work, but the infrastructure doesn't. And, you can't get the infrastructure up until that call is made. Once the call is made, the product needs to be produced...that takes power, people able to get to work, etc., which can't be done until the infrastructure is back up...Catch-22...Naturally, no one is going to produce something unless they're getting paid. But again, without the infrastructure financial services are down.
Okay, let's say they fix 'critical' systems (you know that means from the top down). All the while, most of the population's cold stored food is spoiling. Also, due to the way utilities work, and appliances, they can't cook it...or pump water to wash dishes with, use the toilet, let alone drink. Yes, people have generators...but...they can't get fuel for them and even natural gas companies use electricity to get it there.
So, that means canned goods you can eat cold. Okay, except the stores where you buy them are all blacked out. Besides that, they'll only accept cash...and you can't get cash because all the banks are shut down. Plus, you have to get there, but you'll not be able to get fuel for your car until the power is back. So what happens when people are hungry--or more likely panicked--and there is only a large pane glass window between them and food? After they strip the stores, you're right back to having to make up for the lost product which NOW isn't being manufactured...and won't be for a while as their storage is failing and their raw food materials are spoiling.
So, rather quickly the cities will see chaos as the least composed decide to panic and 'play' anarchy--which it really is because the LE can't keep up operations without fuel and communications.
Rural areas will fare better briefly, but it will be hand-to-mouth. Meaning, kill a pig to eat, and due to the loss of knowledge of how to preserve food, and the inability to 'buy' what is needed to do so, most of that pig goes to waste. Crops and garden stuffs can't be eaten until they ripen, and by that time people again unable to preserve the food will eat what they have and that's it. There will come a point where brood and seed stock is eaten--that means no future crop or livestock--besides the fact as the base of the food chain pyramid, the whole pyramid comes down without it.
Blah, blah, blah...
People go crazy after a week without power. Imagine a month without power, news, fresh food, and no water. Since cell phones and computers don't work, the people will consider them dead, even if they're not. A car without gas is junk. Today electricity is the lifeblood of the civilized world. Without it, it becomes uncivilized.
Mankind got through the dark ages because they had the skills to do so, and could avoid other people who embraced the chaos. In 1086 England had a population of roughly 1.5 million (google). Today the U.K. sits at 68 million, most in urban areas.
Anywho...a month or more without power and you'll see how strong civilization is.
K2
But, the worst part is, folks will expect a rapid recovery which will NOT happen. So, they don't plan, and if you don't plan, you run out.
With just-in-time supply chains (as we have seen during the pandemic), since items aren't stockpiled they need to be produced. To be produced a phone call at the least needs to be made and received. The phone and computer itself might work, but the infrastructure doesn't. And, you can't get the infrastructure up until that call is made. Once the call is made, the product needs to be produced...that takes power, people able to get to work, etc., which can't be done until the infrastructure is back up...Catch-22...Naturally, no one is going to produce something unless they're getting paid. But again, without the infrastructure financial services are down.
Okay, let's say they fix 'critical' systems (you know that means from the top down). All the while, most of the population's cold stored food is spoiling. Also, due to the way utilities work, and appliances, they can't cook it...or pump water to wash dishes with, use the toilet, let alone drink. Yes, people have generators...but...they can't get fuel for them and even natural gas companies use electricity to get it there.
So, that means canned goods you can eat cold. Okay, except the stores where you buy them are all blacked out. Besides that, they'll only accept cash...and you can't get cash because all the banks are shut down. Plus, you have to get there, but you'll not be able to get fuel for your car until the power is back. So what happens when people are hungry--or more likely panicked--and there is only a large pane glass window between them and food? After they strip the stores, you're right back to having to make up for the lost product which NOW isn't being manufactured...and won't be for a while as their storage is failing and their raw food materials are spoiling.
So, rather quickly the cities will see chaos as the least composed decide to panic and 'play' anarchy--which it really is because the LE can't keep up operations without fuel and communications.
Rural areas will fare better briefly, but it will be hand-to-mouth. Meaning, kill a pig to eat, and due to the loss of knowledge of how to preserve food, and the inability to 'buy' what is needed to do so, most of that pig goes to waste. Crops and garden stuffs can't be eaten until they ripen, and by that time people again unable to preserve the food will eat what they have and that's it. There will come a point where brood and seed stock is eaten--that means no future crop or livestock--besides the fact as the base of the food chain pyramid, the whole pyramid comes down without it.
Blah, blah, blah...
People go crazy after a week without power. Imagine a month without power, news, fresh food, and no water. Since cell phones and computers don't work, the people will consider them dead, even if they're not. A car without gas is junk. Today electricity is the lifeblood of the civilized world. Without it, it becomes uncivilized.
Mankind got through the dark ages because they had the skills to do so, and could avoid other people who embraced the chaos. In 1086 England had a population of roughly 1.5 million (google). Today the U.K. sits at 68 million, most in urban areas.
Anywho...a month or more without power and you'll see how strong civilization is.
K2