The last advice
Identify your theme. Write it in a statement. Don’t make it too broad. Think of it as a trend. Something is happening that affects a lot of people.
Then apply the questions rigorously to the statement. What is this happening? Where? What’s the scope? What are the reasons? (There may be lots of reasons, and you could make short posts about three or four.) What are the countermoves? If this trend continues, what is likely to be the result?