So start researching it. What type of essay is it? Persuasive, analytical, expository? First thing you should to is create a 'skeleton'/structure of your essay, listing the main point that you want to get across with each paragraph. Your introduction should highlight those main points, and your conclusion should sum them up.
e.g.
Introduction:
Snazzy opener, list stated objective/aims of essay, discuss how you will meet those aims
Para 1:
Point X
Para 2:
Point Y
Para 3:
Point Z
Conclusion:
Recap aims listed in introduction, summarise how you met them by covering points X, Y +Z, end with a thoughtful closing statement
Not really much I can help you with other than structure for an essay. I assume you're capable of researching the topic yourself. Within each paragraph you should have a topic sentence (your point) and evidence/examples proving your point.
Last edited by Ele; May 26, 2015 at 10:27 AM.