Is there only individual karma, or is there karma of a nation?
There are so many layers of karma. There is individual karma, family karma, community karma, nation karma, and also time karma. There are so many layers of karma. But all that can be changed.
When you sit and meditate, changes occur in so many ways. Don’t think that you are meditating just for yourself. When you do Kriya or meditation, you are not only making your karma positive, but you are also influencing the planet and you are also influencing the other subtler planes. When you do meditation, it has a very soothing and calming influence even on the people that are dead and gone.