Their negative effects are much more vast, subtle, and cultural. You could say many of the broad and widespread mental issues we have in the US is the result of automobiles leading to suburbanization and thus isolation of people. It has created an expensive barrier of entry for existing in society and added a ton of friction to doing anything and everything, especially with people. That's not even getting into the climate effects.

The upsides of automobiles generally all exist outside of the 'personal automobile', i.e. logistics. These upsides and downsides don't need to coexist. We could reap the benefits without needing to suffer for it, but here we are.

I've always lived in walkable cities. I don't own a car and with pollution, congestion, accident risk, pavement obstruction, etc. other people's cars unequivocally make my life worse.

We can argue about whether this is a good trade off, but the claim that cars make everyone's life better is straightforwardly false.

> I don't agree - they have some negative effects

The problem is we are numb to it. 40,000+ people are killed in car accidents every year in just the USA. Wars are started over oil and accepted by the people so they can keep paying less at the pump. Microplastics entering the environment each day along with particulate from brakes, and exhaust. Speaking of exhaust: global warming. Even going electric just shifts the problems as we need to dig up lithium, the new oil. We still have to drill for oil for plastics and metal refining, recycling and fabrication.

They have a net positive effect for every owner, except that they seem to facilitate and encourage ways of living that require automobile ownership as a condition of adulthood in most places. So I'm not entirely sure they're a vast net positive in every value system. In yours, yes, but not in mine.

I think the right term for highways or most other car roads is “car sewer” - you need very specialised equipment to navigate them, they are deadly, smelly, loud and unpleasant. One of the worst environments humanity has produced.

Yes they ship people around somewhat fast. Slower than possible with other methods, and the cost is incredible - economic (much more expensive per passenger than almost any alternative), political (they inherently divide people, dehumanise and make people never really share a public space), health - they reduce lifespan by both lowering living quality as well as directly killing a staggering amount of humans per year).

And we have learned how to build better places for humans that do not need these coffins on wheels - if you visit any European capital, and most Asian ones - you will see environments built for humans, not cars - soo much nicer.

So cars as a technology have definitely not been beneficial to humanity overall, but it has been somewhat useful to some.

I think strongtowns were very good advocates of what places in America could like if you look beyond cars. I personally like the “not just bikes” channel though.

I think it's most obvious in hindsight, probably it was a long time (some decades) before cars were understood to have much of a negative effect at all. Nobody* thought much about air pollution (even adding lead to the gasoline) or climate effects, or what would happen when cities were built enough that they were then dependent on cars, or what happens when gas or cars gets expensive.

All they saw was that trips taking a day could now be done in an hour and produced no manure, and that meant suddenly you could reasonably go to many more places. What's not to like? A model T was cheap, and you didn't even need to worry about insurance or having a driver's license. Surely nobody would drive so carelessly as to crash.

*well, not technically nobody, but nobody important.

The positive effects were immediate, and measurable. The negative effects are delayed, and hard to quantify without all the advancement in climate research since then. If everyone in 1920 knew a 100 years from now there would be climate crisis to reckon with, perhaps a few things would have changed along the way.

Today we have a much better understanding of the world, so we have the means to think down the line of what the negative effects of LLMs and course correct if needed.

A large part of the effect that cars have come from massive subsidies and policy choices that push for cars over alternative options. The comparison shouldn't be "cars vs literally nothing" but rather "car-dominated infrastructure vs the same investments in alternatives". (Not to say that it's an either-or; the optimal equilibrium might still involve some mix of car investments, just far less than we have now.)

They have some positive effect in some situations but the overall effect has destroyed cities and made people fat and isolated.

Kind of like how fat and salt are good for you until you over consume. The world has massively overconsumed cars.

It's not at all clear whether automobiles were a net positive. They are more or less solely responsible for climate change (even emissions not directly from motor vehicles wouldn't be possible without them), which may prove to be the worst mistake in the history of technology.

The benefits accrue to the owners of the vehicles. The negative effects are externalized onto everybody else.

What benefit do cars provide that public transit doesn't? How are thousands of individual cars better than light rail?

Cars aren't a positive in society. Transportation is the benefit, and cars are the worst possible way to transport people. A functioning public transit system is better in every possible way apart from egotistical arguments like "I don't like seeing poor people on the bus".

one trip to Amsterdam will show you how bad our use of cars has been for us

I'd say commercial automobiles probably have a net positive effect. (Though their impact on pollution and climate change can't be discounted.) But daily life in walkable and public transitable European cities is so, so much nicer and healthier than in most American cities. I'd trade ubiquitous personal automobiles for that in a heartbeat.

No - as a society we cannot say that its a “vast net” positive. The externalities that harm the commons are not accounted for.

We (or lobbyists) resist having carbon costs included in the prices we pay at the pump.

Edit: More transportation is good; I am not throwing the baby out with the bathwater, just that our accounting for costs makes things look better than they are.

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