After colonizing a new system, immediately begin its development. Your first construction priorities should be infrastructure that boosts your primary output: Food for population growth, Industry for faster construction, and Dust for economic stability. For your home system, prioritize Industry and Science to accelerate your research and production of advanced ships and improvements. For newly colonized systems, focus on Food to quickly grow your population, which in turn boosts all other outputs. Once population is growing steadily, shift to Industry to build out the system's infrastructure. assign a hero to your most productive systems to further enhance their output. Always check the system's unique planetary traits and build improvements that synergize with them.

Initial System Development — Endless Space Guide