Just imagine for the next 2 minutes that SEO was dead. Dead in the context that external link building practices was dead and no longer worked to rank your site organically in Google. Dead in the context that Google would only rank your site for legit social signals and Google would have the technology and ability to know if your social signals were organic and legit or bot / paid traffic. What would be your strategy and how would you get your site to rank organically on top in the search results? As a bonus, lets pretend all the other search engines are also dead and google is the only search engine on the internet.