A democracy government dramatically increases trade in the same manner as a republic and has one major additional advantage. There is no corruption in cities under a democracy, which makes it very useful for large empires. However, a democracy has two unique worries. First, military units not in their home city cause two citizens to be unhappy, not one citizen as in a republic. This makes war especially hard to wage. Also, if any city in a democracy slips into civil disorder, the government is immediately overthrown and becomes an anarchy for several turns. While a democracy has tremendous economic advantages, it is fragile and requires vigilance.
- +1 trade bonus in all tiles that already produce trade.
- Every unit outside its home city causes 2 unhappiness. (exceptions: settlers, diplomats, caravans, transports).
- Units cost 1 shield of maintenance. Settlers consumes 2 food units.
- Can't declare war, and must accept all peace treaties.
- If a city is in revolt for more than 2 turns, you immediately fall into Anarchy.
- No Corruption.
Advisers are Greeks in the ancient age and Americans in modern age, its leader is known as a President.
The Women's Suffrage wonder reduces the unhappiness penalty for units outside the city to 1.
The most important aspect of Democracy is that it has zero corruption. Although unrealistic, this allows you to make massive amounts of money through taxes, and production is also maximized. You will likely have to allocate some tax revenue to luxuries to keep your people happy to avoid a collapse into Anarchy. And, of course, you cannot declare war. These are easy trade offs to make however, considering that you will have enough money to buy any building, unit, or enemy city using a Diplomat.