Wellness is an indicator that the higher it can gets (max 100%) the higher the incomes are from all of our activities such work, war, slave taxation etc.
It can raise if we wear clothes (they last one month and they can give from +10 up to +50 wellness daily ) , if we live in our house or a rented one (from +5 up to +25 wellness daily) ,if we read magazines, if we drink wine , if we eat food etc. and drops every hour ,when we work, we fight , we walk etc.
Bonuses, each country depending its economical wealth gives to all players some bonuses for working, for the slaves they own , the fights they make etc.
Slaves , in this game nobody is free. Everyone and each one is a slave of someone. To own a slave gives you the right to taxation him up to 25% of his incomes of all his activities.
There are two kind of slaves ,the dict ones that you must pay every week to keep them blocked (they cant be attacked from other player) and the permanents slaves that you dont pay to keep them.
You can sell the slaves to other players and make huge profit especially if they are productive.