Hi there Sufi1 and everybody who reads it!
Below, I present an exemplary answer to your question. In order to have the final speech, you will probably need to elaborate it a little bit more. This bit should set you on the right track though :)
Citizens have a right for good governance
My name is James Harper and I'm just a regular guy who happens to be interested in social studies. So when I discovered my passion for everything that's connected to social constructs and group pshychology, I decided to pursue this passion. This short talk is the results of this pursue.
When you take a look at maps showing how parts of big cities are dvided between people of different passions and interests, you will also be able to see how different we all are (attachments 1~3). Then, if you try and imagine this kind of diversity on a bigger scale - country-wide scale for this instance. You will have no doubt that there's nothing like homogeneous nation. In my opinion it's not only the origin of a person that matters but also the values they represent and those differ, no matter if nation is build with only one nationality or fifty of them.
Having said that, let's wonder for a second, what would happen without a government? It's highly likely that the more aggressive groups would eventually devour the smaller ones. In other words, we could suppose that there would be an anarchy from which we would end up with a regime. However, we know now that sometimes it takes one person to change the world, so what if those people were in the groups that wouldn't win because they were smaller? We could lose potentially great ideas and people!
Now, a good government ought to provide good environment for development to every single citizen. We know that it never works perfectly, but good democratic system can, theoretically, provide great leaders and amazing representants of every single of those groups. In a perfect world, in a democratic country, we have representants for all the social groups from a country and therefore, we can build an average best version of our future based on the consistency of the society. That's the perfect vision though...
[that's it! You can continue by saying what's the actual situation compared to the perfect vision I presented. You might as well just finish here and write a short summary to prove your point. Remember about call-to-arms like expressions which should appear at the end of your speech. Engagement of your public is the key to the success when writing and giving a speech.
All the best!