I think the weight of the essays, chronicles or something written which exposes a thesis or a personal opinion is the conclusion.
And most importantly, the conclusion has to be a clear reflection of our thoughts and beliefs. The research and the process of redaction and conjunction of ideas is important but, the way we finish gives us our own style and the verdict of the readers. We can be emphatic with them or disgusting. The conclusion is the best way to connect with the audience.