Buddhism means enlightenment so it is a natural course of mental/spiritual/emotional evolving, individually and collectively. That process exists irregardless of what humans name it. It exists in all intellectual life, and with quantum physics, possibly else where's too. The core of the many faceted diamond, so to speak. The population growth will reach not much further than mother earth can nurture it. Some countries already have population control measures, most just wing it until the wheels fall off.
We cannot what WILL happen in the future, but the weather forecast will tell you if this is likely to happen.
Religion is a factor of family. If one happen to be born into Christian home, it is likely such a child will turn out to be a christian. But Buddhism is practiced by the Asians.
they are most likely to become isticnint
Y
the plankton population would decrease
Y
Sayori and Aido do seem to be close, in future Manga, it does seem likely.
Buddhism most likely originated in Nepal, since that is where the Buddha is originally from. The second most likely place is India.
Because Buddhism rejected the caste system.
No, not really. It's kinda like a vision of one possible future. Although it not likely to happen. It is an ongoing vision of the future.
the coatis will eat more figs
the plankton population would decrease