How nice to hear such a positive review from a new member from abroad!
It's great to hear we're a news source for people with limited access to news -- that makes my day!
Our news in the U.S. is also limited, in a different way. Our mainstream media is now owned by just a few mega-corporations. It greatly limits what used to be a much more independent media in our country. The "news" is censored by corporations' with conflicts of interest, among other problems. Their interest is in skewing the news to meet their interests, suppressing and omitting incredibly important news that would go against their interests, and so much more.
That's where our invaluable independent media come in and where DU becomes invaluable. Through the mix of mainstream and independent news found on DU, and particularly presented by those who synthesize information from a number of sources into a story-telling whole, DU becomes truly unique and indispensable. So many independent resources -- The Nation, Mother Earth News, Think Progress.....and on and on. They're nonprofit, reader supported for the most part. There are some great more traditional magazines & papers who can usually be counted on to publish some fascinating & independently newsworthy articles -- The New Yorker, The Atlantic, Wired, and quite a few more. I've been subscribing to Vanity Fair for years -- yes, it has boring fluff, but it also often publishes excellent articles that explore important issues in depth (as does The New Yorker, to which I also subscribe -- it's important to pay for subscriptions whenever possible to support these media....I subscribe to a number of independent papers & magazines when I can actually read all or most of them online for free.)
As for the groups, good question! As Cal Carpenter mentioned, the groups are created in response to members' requests. You point out two glaring omissions of two incredibly important parts of our world. When you look at the groups, they seem to be mainly set up in response to requests from members who live in those areas. It's hard to believe we don't have Asian and African members. We certainly have at least one Asian one -- you! There have to be many, many more.
There's an "Ask the Administrators" group where your question could be posted and posed to the administrators. You might pose your question to them and suggest both groups.
Again, welcome!