1.Yes.
Weed will be decriminalized on a nationwide scale within the next ten years. It will be regulated and taxed just like tobacco and be under ATF domain. Other drugs may be decriminalized in small amounts, although personally I think we'll be lucky enough to get weed and that's good enough for me.
2.Yes.
I'll give this one fifty to sixty years. As soon as the international community can come to an agreement on climate change and set global standards for emissions and environmental safeguards we'll finally be on the right track. The rich countries would also have to agree to pay some kind of reparations to developing countries for the damage they caused them from past pollution and both developed and developing countries would have to agree to adhere to these standards and punish those who do not. Also, while however painful these may be, there should be a tax levied on the consumption of oil, natural gas, coal, gasoline, and any other kind of fuel that when burned has the potential to cause pollution. This kind of self-imposed economic sanction will drive the development of more sustainable forms of energy, which when developed will put an end to the "oil crisis".
3.Yes.
If Israel wants the continued support of it's American and European allies and the respect of it's neighbors in the Middle East it will have to make peace with Palestine and agree to a two-state policy with a shared Jerusalem.That would mean no more new settlement building that encroaches upon Palestinian communities and agreeing to let Palestine be an autonomous state separate from Israel. It would also help if Israel were a little more secular, because it seems that the only thing standing in the way of peace talks now are the Jewish fundamentalist in power.
4.Yes, hopefully.
I say yes, because I think America is the most competent and has the most capacity economically, the most expertise security wise, and at least sixty years worth of experience of leading the world of states. Two necessary elements super power wise.
I say hopefully, because I fear that the EU or China would not be very capable superpowers. I feel the EU is too divided and meek to steer the course of international relations. I feel that should conflict ever break out somewhere they would bicker about what to do and by the time they arrive at a decision it would be two little to late. The countries in the EU have too many differing opinions on how to govern that a consensus would be hard to build. China, I fear, would be the exact opposite. They seem to have a tendency to micromanage everything that falls under their domain. They would make no concessions to other countries and try to remake the rules in their favor. It seems to be their habit thus far. They would make enemies quick and further embitter East/West relations, which helps no one.
>>16 btw, i do agree with your theory on China, so I don't think we have much to worry about from them