Popularity
The number displayed at the top of the Popularity Information panel shows the overall popularity.
This represents the total of all the popularity factors listed below it. By increasing or decreasing the individual popularity factors you can determine the exact speed in which peasants arrive at or leave the castle.
This can change if you run out of gold (for bribing), rice, vegetables, meat or tea, or if your population changes or if an event is taking place.
Peasants will stop arriving at your castle if you do not have enough houses to house them.
Tax - Taxing your peasants is one of the best ways to generate gold. The more peasants you have working in your village the more gold you will gain from taxes. However raising taxes makes you unpopular. There may be times when you need to switch from taxing your peasants to bribing your peasants. For example, if you need to increase your immigration rate to quickly raise an army or if you have run out of food and need an emergency popularity boost. It’s an expensive move but your peasants will love you for it.
Rice Rations - Rice is the staple food enjoyed by your peasants. Just by feeding your peasants normal rations you will gain a popularity boost but increasing this to double or triple rations will make you even more popular. If however you are running out of rice you may prefer to opt for half rations, cutting the amount of rice being consumed but also incurring the wrath of the peasants. Be careful as running out of rice (or setting no rice rations) will make your peasants extremely unhappy
Vegetable Rations/Meat Rations/Tea Rations - The peasants see vegetables, meat and tea as luxurious additions to their rice diet. The more vegetables, meat and tea you feed your peasants the more popular you will be, just the same as rice. However, unlike rice, if you run out of vegetables, meat and tea, you will not incur negative popularity.
Housing Bonus - Simply put, the higher the quality of housing you build, the happier your peasants will be (See Housing Quality). The housing bonus can also be negatively affected by overcrowding. If you do not have enough houses to support your population (maybe they have been destroyed by an enemy) then this will lead to overcrowding which will make you unpopular with your peasants.
Spirit - Your peasants are spiritual beings. The higher the proportion of your houses and work buildings that are within the radius of the temple, the greater the spiritual enlightenment and the more popular you will be.
Fear Factor - Do you want to be a good lord or bad lord? Good lords receive a popularity boost. Bad lords suffer from a popularity hit.