The current extinction event would seem like a tremendous amount of evidence that many species have a hard limit on how fast they can adapt. On a smaller scale

The current extinction event would seem like a tremendous amount of evidence that many species have a hard limit on how fast they can adapt. On a smaller scale there are many people that died in fire they themselves had started. Culture (information stored in the brain) changes faster than DNA, but its ability to change is still limited, especially in older folks. In order to survive, we need our environmental conditions to remain in a reasonable range (temperature, atmospheric composition, weather). According to some predictions, some parts of the world around the equator will be to hot for people to live at the turn of the 22th century. The ocean (50 to 80% of the photosynthesis) is already in a sorry state and we keep on pushing. So far, so good... https://soundcloud.com/user-876103472/grow https://soundcloud.com/user-876103472/grow The earth is like an Apple pie, let's eat it and let's eat it and let's die! Do you want some more? It's ...hmm... delicious! To take on another of your initial points regarding the fitness of invasive species. Being too aggressive is not necessarily being fitter. A specie (not necessarily human) that's too dominant can crash the ecosystem that sustains it and cause it to collapse, bringing its own demise.