Development Growth
Development is a fundamental mechanic in Crusader Kings III that directly impacts the prosperity and potential of your provinces. Higher development levels lead to increased tax income, larger levy sizes, and faster construction of buildings. Strategically investing in and fostering development across your realm is crucial for long-term economic and military strength, allowing you to fund ambitious projects and field more powerful armies.
Development in a province is a measure of its economic and technological advancement. It is represented by a numerical value that increases over time, influenced by several factors. The most sificant factor is the 'Development Growth' modifier, which is influenced by the province's owner's 'Stewardship' skill, the 'Development Growth' policy of the realm, and the presence of specific buildings. Provinces with higher base development also tend to grow faster. Furthermore, certain cultural innovations can provide bonuses to development growth. The 'Feudalism' and 'Centralized States' innovations, for example, sificantly boost development in their respective eras.
To maximize development growth, focus on increasing your ruler's Stewardship skill. A higher Stewardship directly translates to a higher base development growth for all your controlled provinces. Ensure your realm has the 'High Autonomy' or 'Low Autonomy' development policy set, depending on your preference, as these can also influence growth. Prioritize building 'Village' and 'City' structures in provinces with high potential, as these provide direct development bonuses and unlock further building options. Regularly check the 'Realm' tab for your 'Development Growth' policy and consider adopting innovations that specifically boost development. Provinces with high existing development, such as those in the Italian peninsula or parts of the Holy Roman Empire, are excellent targets for focused development. Investing in these areas early can yield sificant returns in tax and levies over time.