website_ software

I want a website in which users can discuss different topics. They way it is going to work is that you would have to register, once you register you can upload your own photo or an avatar as a display picture. Then there will be a list of categories for example politics, science, Education, and more. clicking on any of these categories presents a list of topics to be discussed. for example if i click on the politics category, and then on a topics lets say " Who do you think would win the next election" it would show a brief summary of the topic and it would allow me to comment on this topic. as well as this it would allow users to post their own content. so it would have a feature called article submission where you can submit an article lets say in the politics category you click on the article submission link, it would allow you to post a brief summary of the topic for example imagine that you have read an article about the western countries wanting to talk to the Taliban. once you click on the submission link you would type a brief summary of the topic, or copy and paste the whole article there. as an example Title: The west wants to talk to the Taliban Summary: More than 60 countries have gathered in London to set up a fund, to lure Taliban fighters to stop fighting and join the government. link: [login to view URL] and you can comment on the article the above is just an example NEEDS TO BE CREATED FROM SCRATCH