Getting help with structure of essay

Hi, I'm writing an essay comparing the electoral systems of two countries and the general effects they have on representation

Anyways I have decieded that my thesis will be:

Through differences in their respective electoral systems, the German Government is more representative of the citizens' interests than the American Government which mostly represents the interests of multinational corporations.

Anyways I have been having trouble getting started on the essay and was wondering what do you think the structure or flow of my essay should be?

In other words how should my essay and thus argument unfold itself? specific in that how do I (in a general sense)  introduce and conclude my essay?

Please include any additional suggestions/critiques/insight as it would be very much appreciated!!