Crassula muscosa grows all over the southwestern part of South Africa, adapted to a range of habitats. The more challenges a species masters, the better its chances of coping with future climate and other changes.
C. muscosa is one of the easy plants to grow from small pieces of stem. The plant could never multiply as effectively as people and cannot spread as pervasively.
Plants and animals have only their own bodies to use in propagation and survival. Humanity on the other hand, has modified the habitable environment into one huge home for itself, the rest increasingly transformed into a comfort zone and playground. All else that lives is squeezed out into marginal existence where and when it pleases humanity to be so kind. Every successive generation of people, since mass production and massive human population growth arrived with the Industrial Revolution, has fewer options for controlling its own viral escalation.
Look at the plants and animals and enjoy them! For each generation of people now sees less of Nature as she used to be before the brain became the bane of all that lives (Manning, 2007; Vlok and Schutte-Vlok, 2010; Bond and Goldblatt, 1984).