Currently rationalism works the following way (R&F/GS): Extra Science from buildings in Campuses: +50% if city population is 10 or higher, +50% if district has at least +3 adjacency bonus. There are also similar policies for gold (Free Market), culture (Grand Opera) and faith (Simultaneum). Anyone who plays Civ 6 on decent level knows how important these policies are. Once you get them, you can easily double your science output (if you meet their requirements). That's the point when you start gaining more science/culture than the AI (Deity) and start gaining huge advantage. These policies are responsible for a huge % of yields in your empire. From my experience, they are one of key reasons why wide > tall in Civ 6. No matter how big you can grow your cities, every city can have only one campus, and every campus' bonus from Rationalism is capped at +100% for 10 population. That's why growing your cities past 10 pop is not really rewarding in terms of science and culture (you still have to do it to work more tiles and place more districts, e.g. airports and spaceports). Therefore, having more space to place more cities is one of key factors in winning games, and it's not really skill-reliant. The idea that I propose is meant to uncap bonus yields from these policies based on population. I propose to rework each of mentioned policies the following way: +8% to yields from district's buildings per unit of population in this city (e.g. +80% for a city with 10 population, +200% for a city with 25 population, etc.). Additional +20% if this district's base adjacency bonus is +3 or more (+4 for commercial hubs). This way the policy allows your empire to grow the way you prefer. One city with a single campus and 20 population will yield the same amount of science as 2 cities with 10 population each (if adjacency bonuses are ignored). In terms of raw yields, it's still better to have more cities (due to adjacency bonuses and its +20% multiplier), but playing tall is not as punishing. Let me know what you think!