The cyanobacteria definitely were parasites. It is only in hind sight that we can see how beneficial there were for us. It might be likely that all the destruction we are causing now might be beneficial to some other species or even us down the line. But right now we are bad for the earth.Greta wrote:The only way you can make the claim that humans are parasites is to also claim cyanobacteria to be a parasite during the Great Oxygenation Event, an extinction around 2.3 billion years ago http://www.slate.com/blogs/bad_astronom ... ction.htmlsthitapragya wrote:Could it be that since we are the only empowered and intelligent species we know, we believe there is no other way? Whatever it maybe, even an accidental change like rapid industrialisation, we made the choice and we caused mass extinction. We cannot avoid the fact that as far as other species are concerned we are death personified. We are parasites whether we like it or not. We probably have the ability to recognise this and therefore change it, unlike a virus or a rat, but till we do change it, we are worse than rats because we knowingly made the choice to destroy other species.
There's a few future scenarios, and each involves significant degradation of ecosystems and increased desertification:
1) A mass extinction that includes humans
2) A mass extinction with communities of survivalist humans remaining
3) as with #2, but with high tech, insulated, self-sufficient cities for the privileged
4) humanity changes its behaviour and become wise stewards of the planet and control population and consumption, with major ecosystems weakened but still surviving enough to bounce back quickly
5) aliens save us at the last minute akin to 2001: A Space Odyssey or Interstellar scenarios
I consider #4 and #5 to be laughably unlikely. Fantasy.
How do you see the probabilities? Have I missed any possibilities above? #4 is clearly the realms clutching at straws but included for the sake of completeness.
Of the scenarios given above, even 3 seems less likely because it would limit the possible cataclysmic events to only a few. 1 or 2 are inevitable. We just don't know when. There is also the possibility that we might be creating an environment for some deadly virus or bacteria which might end humans alone.