a conclusion does two things

two paragraphs for the rough draft ; only one paragraph for the final product

• recommending paths for future research; disclose future-oriented; NOT a repeating of what already happened; cryptic conversion with another researcher; where it goes from here; instructions for where to go from here and why, what lines of thought you'd imagine another reserach might want to take up, what sources she might want to look closely at, what you didn't have time for but wish you did, a source you had to exclude but that might be good for another purpose, etc. reserach scraps that might be relevant for differnt projects 
• any kid of personal investment in the topic