Similarly, the overall suffering caused by an earthquake might supervene on the spatio-temporal entities that constituted it, the deaths it caused, or the natural disaster itself.
One way of maintaining the causal power of mental events is to assert token identity non-reductive physicalism - that mental properties supervene on neurological properties.
For example, if psychological properties strongly locally supervene on physical properties, then any two people physically the same, in any two worlds, will also be psychologically the same.