Do you think humanity will last much longer? Dinosaurs lasted for millions of years but I don't foresee that as being the case for humans. It is because we do require, expect and want more as well as our negative attributes are more conflated because of these attributes. Unless we will be able to leave earth to colonize other planets or there is a mass extinction or disaster that kills most humans, I predict a eventual implosion leading to some major disaster or a nazi type of regime for resources. There are some major reasons for this. There is not much left undiscovered or uncharted on this planet anymore. Even global travel will become more redundant as, again, too much human footprint, nothing much left that is virginal or new. Look at the population explosion and the resulting pollution of the air, water and soil. If we don't move a portion of the human population off the planet, i foresee a world war three in the future. This planet can't sustain the mass population and consumption for much longer as well as the eventual boredom/ennui and restlessness of redundancy with little new frontiers. Space is the next step for that new frontier and if humans cannot do that successfully, it will be a problem if population and lifestyle is not downsized.