Similarly, I've always dreamed of a service like this. At least one that informs you of world-impact-level events; wars breaking out, major disasters, etc. It'd be nice to find out about these quickly, without stumbling on it later.
I haven't tried this but you might get something out of creating a reddit multi (maybe r/worldnews, r/news, r/science, r/foodforthought, and whatever else), check it once a week and sort by top and "this month" or "this week". The top ten links are probably impactful, engaging, and relevant.
The lazy in me would actually like this in a weekly email.