Cristiano Rastelli presents at a London CSS meetup, discussing the ongoing 'war' within the CSS community, highlighting the conflicts, challenges, and evolution of web standards and technologies. He emphasizes the need for understanding the reasons behind these disputes and advocates for a truce in the community, calling for pragmatism and curiosity rather than dogmatism. The talk reflects on the transformation of CSS into a more professional discipline, akin to the earlier evolution of JavaScript.