Presenting details like how were similar problems dealt with in the past can be a plus for your essay.
All discursive-essays should follow a strict structural rule.
For instance your topic for discursive-essay can be death penalty.
You must include arguments supporting and opposing this issue.
You are not expected to start political debates and present dozens of striking facts and contradictory things to discuss.
You should not sound as if you hate your opponents.When you argue, you must not disrespect your opponents or show that you do not tolerate their opinions.In general, stating your opinion is enough in a discursive essay.Generally these essays are written about opinions of famous scientists and researchers.You will not need to include any discussion in such essays, only opinions from the great scientists and researchers are enough for these discursive-essays.If you have supportive arguments for your position, your opinion gets much more enhanced and your readers will feel convinced with your efforts.It may seem that it is a child's play to write a good essay, but there are a lot of hidden pitfalls one should be aware of.Showing your own point of view is not good for the discursive-essays.It would be much better if you can add some quotations of great personalities and include examples from their lives.On careful study of what they say and believe, you have to start choosing those elements and aspects which cause controversies and debates on the raised issues.Note that although the evidence is not regarded as an obligatory part of this type of writing, it still can be included in the paper.