I would think colder weather would be more un-desirable. Like the many feet of snow in upstate NY and California this year, where many were snowed in for weeks, so they had to air drop food.
When it gets cold, you can wear more clothes..
When it gets hot, you can only take off so many before they arrest you.. (LOL)
Too hot, too cold, its just amazing how the Earth is the perfect distance from the Sun to make life possible at all. Solar maximums and minimums have a huge impact on Earths temperature. I am just happy we are blessed to be within the goldilocks zone.
The goldilocks zone isn't such a narrow band as your statement seems to imply. In our solar system, the goldilocks zone starts around Venus and extends out past Mars. The problem with Venus is.. ready for this? Carbon Dioxide! LOL. Too much of it. And the problem with Mars is simply a lack of a moon large enough to make the core slosh around and generate a magnetic field.
If Venus didn't have all that Co2, it would probably be a tropical planet and be habitable. Maybe not, it doesn't have any significant moons either.
The goldilocks zone is also changing, albeit pretty slowly. As our star ages it will grow in diameter, the habitable zone will move out leaving Venus behind and eventually Earth as well.. My best guess is about 1 billion years before our star starts to really cause Earth to warm up beyond what life can take... It will only need an increase of less than 5% to cook us. At around 3 to 5 billion years, Earth will be a scorched oven and will eventually be inside the Sun's atmosphere.
Did you know some explorers found tropical plant fossils in Antartica, and that the Earths magnetic poles show complete shifts shown in some seabed floor samples?
Yes, I'm aware of that. Antarctica wasn't at the south pole a long time ago, it was part of a larger continent, moving around with the rest. It was most likely at a higher latitude at one time and plant life took hold.
If your thoughts were that Antarctica used to be warm at its present location, I'm pretty sure that is incorrect. I don't think its land mass was at its current location when the plants developed.
Earth's magnetic field has been weakening for some time and it has been suggested that the poles are going to flip soon.. Soon might be next year or 1000 years.. no one seems to know.. The Sun's poles flip every 11 years.
Humans are but a blip on the radar from a geological perspective. We may all be gone tomorrow if there is a meteor impact or we are stupid enough to blow ourselves up.
Neither is likely. If we saw a large space rock heading this way, we could divert it. It would probably take a world wide effort, but I'm pretty sure we could do it. Depends on how much time we have.. if a 10 mile wide rock were discovered a year before it hit, then no.. we'd be screwed.. but with so many astronomers looking up these days, that's not likely to happen.
As for blowing ourselves up.. while it was certainly set us back, we would also survive that as well.
Remember the end scene from planet of the apes? It can happen any time. We need to spend our time figuring out what we can do to all live together in harmony and peace, instead of pitting everyone against each other, or creating classes of victims. Every individual needs to understand how precious life is, and how delicate our way of life has become.
Human evolution on a society front is a massively complicated issue. Even our wars have provided us with some of the things we have today.
If we don't straighten out our act, nature is going to do it for us. My best guess is that will be a combination of things that take place over a ten or twenty year time span. An unusually hot summer that kills crops, a limited nuclear war, disease, etc. Eventually, a few billion people will be killed off before things settle down. This planet can not support almost 200 countries with their own self interest while hosting 10 billion people.
Successful and widely available Nuclear Fusion would solve almost all of our problems..