Everything is spreading. We're a large interconnected world, and we'll inherit everyone's problems eventually. There are better alternatives, but it's not something people will seriously consider.
Thinks have been spreading for quite a while. Migratory species are older than ourselves. Jet stream can carry spores over oceans. World commerce is older than you think. Wars and migratory movements has always been a part of our civilization.
I'm aware that trade networks long precede recorded history, and potentially precede fully-modern humans. The fact that you can have homsapien admixture (eg: homo sapiens + denisovans) far, far outside of Africa is proof enough for that.
The time scales did use to be different, and speeding things up as much as possible does not seem to be a good thing.
Also, what is that babble about "the planet's ecosystem" being better off by eliminating humans? If you really want to see it as a whole - the Gaia hypothesis - then humans are part of it just like flies and ticks and mosquitos and birds and whales. All play a role, some spread diseases to others while they feed yet again others. Removing humans from the equation is just like Mao's decision to get rid of the sparrows which ate some of the harvest in that the balance will shift until a new equilibrium has been reached. In Mao's case it killed tens of millions of humans, removing humans will result in the death of hundreds of millions of other species.
We are part of the ecosystem no matter how much you try to deny it. The planet will abide, humans most likely as well. If you want to call for fewer humans on the planet - something which seems to be the future anyway since births are rapidly declining almost everywhere - that's fine but realise you're just following others like Malthus who did so before. Malthus was proven wrong many times over, you will be proven wrong as well since if there's one thing humans are good at it is adapting to a changing environment. If it gets colder humans adapt, that's how we made it through the series of glaciations. If it gets warmer humans adapt, that's how we made it through e.g. the Roman and Viking age warm periods.
The entire South American primate and caviomorph rodent lineages (everything from capuchins to capybaras) descend from African ancestors that rafted across the Atlantic on vegetation mats roughly 40 million years ago.
When the Isthmus of Panama closed (~3 million years ago), North American placental mammals poured south and drove a large fraction of South America's endemic fauna—native ungulates, many marsupial lineages—to extinction.
Yeah. Some species get crowded out, maybe we should avoid that in a lot of cases, but is not the capital sin western people have been brainwashed to believe it when they replaced their christianism with new age Gaia worship. Species get extinct, eco-systems change, sometimes it is worth preventing that, in other, who fucking cares?
The big deal is that when a species becomes invasive, the effects can cascade. You don't just lose their direct competitors and their prey, you can lose anything they pollinate, nest in, are nested in, etc. You can replace a diverse ecosystem with a near-monoculture.
Of course, if you don't hold the fundamental belief that biodiversity is Good, and is Better than raw biomass increase, I see why this doesn't bother you, but I do hold that position.
These are opinions and I understand not everyone has these same beliefs.
Dogs are even worse. Make them shit in your own backyard please.
If you are a city dweller please do not keep “pets”, it’s bloody ridiculous, thank you.
Domestication of animals might be the single greatest achievement of humans.