The first style uses a list of two or more points. Your instructors will often call this your "thesis" -- your position on a subject. This version, like any good thesis, is not self-evident; its points,will have to be proven with evidence in the body of the paper.
This statement does not fulfill the assignment because it does not require the reader to think critically about society.
For example, "Communism collapsed in Eastern Europe because of the ruling elite's inability to address the economic concerns of the people" is more powerful than "Communism collapsed due to societal discontent.
Some Caveats and Some Examples A thesis is never a question. Couldn't that be "the best thing"? Readers of academic essays are like jury members: before they have read too far, they want to know what the essay argues as well as how the writer plans to make the argument.