The universe is about 13,750 million years old. The Fermi argument suggests that - if there were intelligent aliens in this galaxy, they should probably have filled it by now - unless they originated very close to us in time - which seems unlikely. The argument applies much more weakly to galaxies, because they are much further away, and they are separated from each other by huge regions of empty space. Also, the Andromeda Galaxy is just one galaxy. Say only one galaxy in 100 has intelligent life - and the Andromeda Galaxy isn't among them. That bumps the required distance to be travelled up to 10 million light years or so.
Even within this galaxy, the Fermi argument is not that strong. Maybe intelligent aliens formed in the last billion years, and haven't made it here yet - because space travel is tricky, and 0.1c is about the limit. The universe is only about 14 billion years old. For some of of that there were not too many second generations stars. The odds are against there being aliens nearby - but they are not that heavily stacked. For other galaxies, the argument is much, much less compelling.
Ideally, I'd like to save the world. One way to do that involves contributing academic research, which raises the question of what's the most effective way of doing that.
The traditional wisdom says if you want to do research, you should get a job in a university. But for the most part the system seems to be set up so that you first spend a long time working for someone else and research their ideas, after which you can lead your own group, but then most of your time will be spent on applying for grants and other administrative trivia rather than actually researching the interesting stuff. Also, in Finland at least, all professors need to also spend time doing teaching, so that's another time sink.
I suspect I would have more time to actually dedicate on research, and I could get doing it quicker, if I took a part-time job and did the research in my spare time. E.g. the recommended rates for a freelance journalist in Finland would allow me to spend a week each month doing work and three weeks doing research, of course assuming that I can pull off the freelance journalism part.
What (dis)advantages does this have compared to the traditional model?
Some advantages:
Some disadvantages:
EDIT: Note that while I certainly do appreciate comments specific to my situation, I posted this over at LW and not Discussion because I was hoping the discussion would also be useful for others who might be considering an academic path. So feel free to also provide commentary that's US-specific, say.