Remember that you are writing this essay to explain WHY something happened, or WHAT has or will happen because of the original situation. Your subject itself is either the end point of the causes or the starting point of the effects. The reader needs to know how this information will help them understand things better. You are NOT just proving that these situations or circumstances are connected. Somehow knowing that connection has to be usable by the audience. Even if it's just understanding the subject as more complex than the reader originally thought, there needs to be some value added to the subject.
Always remember that you are presenting us with A cause or An effect, the THE cause or THE effect. There are always more ways to interpret the situation. You are simply presenting us with your best understanding/interpretation of the situation.