The best form of worship is the pursuit of knowledge - Prophet Muhammad (PBUH)
The underlying problem that causes radicalism is not only poverty, but ignorance or lack of religious education.
We need to read the whole thing to fully understands religion, and oftentimes people just rely on a teacher to do the hard work for them. Sometimes they don't even choose their own teacher, but someone comes along to teach religion for free, something that they might not be able to afford to begin with.
And that's when the brainwashing begins, when ignorance or lack of religious education (a blank sheet) meets someone who is charming but with a radical agenda.
So I guess one of the main solutions for any country in tackling radicalism is to provide a proper religious education, before any nation is completely overtaken by the radicals.