The rationalist community is broadly defined by these beliefs:
First, that rational inquiry and empirical evidence are the best tools to make sense of the world, and that it is essential to confront human biases.
Second, that our world is a harshly neutral world, with physics indifferent to our suffering.
Third, more subjectively, that it is right and good that we look upon the world and have opinions about how to change it. That it is wrong that millions struggle in poverty, or die of malaria, or are trapped by systems we built ourselves that are indifferent to our struggles.
Recently, we have seen the creation of rituals around celebrating these beliefs, such as a celebration of the winter solstice, where a group of rationalists "'ate some food, sang some songs, and lit some candles' and 'told stories about why the universe was the way it was and about what kind of people we wanted to be.' At the end of the gathering they extinguished the last candle in the room and sat for a moment in darkness."