To go for your question specifically, I doubt it matters much. Whatever's going to happen to the world in the next few decades will not be affected much by the UK being in or out of the EU.
I think the decision is so complicated it's basically impossible for most people to have any kind of real understanding of the pros and cons, so we - as ever in politics these days - will decide through soundbites, oversimplifications and complete bullshit. Just for a change.
My personal take right now:
> I don't trust our national government, banks and so on to be 'better' for society without the EU's rules and regulations. Just the opposite if anything.
> The prominent spokespeople for the Exit campaigns are almost entirely repellent pond scum about anything else they hold an opinion on, so I'm not inclined to expect them to be any different this time.
> Therefore, remain.
There's part of me that would be interested in working it all out properly and rationally, but it's a waste of time to attempt it.
edit - I also just realised I should add a point that by no means do I like all the prominent Remain spokespeople. David fucking Cameron for a start. But still, it's not quite such an exclusively cunty club.
EDITED: 29 Apr 2016 15:09 by MILKO