When writing a French essay, it's important to not forget to follow a good, coherent structure just like you would when writing an essay in English or any other native language. 

Introduce your essay by reformulating the set question, plan a main body according to the task at hand and then don't forget a summarising conclusion which links back to the set question and highlights your stance on it.

Along the way, some useful linking words to join your paragraphs would be: 

Ainsi (thus), par conséquent (consequently), autrement dit (in other words), en effet (in effect), en fait (indeed), en plus de cela (on top of this), de toute façon (in any case), bien que/quoique + subjunctive (although), malgré ça (despite that)