How you win also changes as the game progresses!
There are 4 different types of cards in the game. These two types, Keepers and Goals, are what allow you to win.
A goal card changes the current winning condition of the game. For example, if the goal played is "Hippyism", then whatever player has the "Love" and "Peace" cards played in front of them on the table is the winner. Remember that when the game starts, there is no Goal. So nobody can win the game until someone plays a Goal card.
The Keeper cards are played in front of you on the table, and are what allow you to win. For example, if you have the "Cookies" and "Chocolate" cards in front of you on the table and the "Chocolate Cookies" Goal card is played, then you win the game.
But what about those changing rules?