Sylvester worried about the situation but, at the same time, understood that he didn't have enough information to take any action against the anti-light yet. He spoke with Felix, and it would take them almost another full day to return. So, he decided to wait and focus on other things that mattered.
One of the main things that he worried about most was the literacy levels of the people. He had read a few entertaining books before where the main character goes back in time and revolutionizes society. It was easier said than done. Because, to revolutionize society, he would need a generational, constantly improving knowledge base.
Starting from scratch wasn't easy since everyone would begin learning at the same time on the same level. There were no genius professors or inventors yet. Sure, there were great minds with higher IQs, and Sylvester placed his hopes on them to study faster and innovate on their knowledge.