Violence is preventable, for the most part, amongst humans (It's necessary in some situations in other species, like in hunting or mating rituals, but we have intellectual/emotional capabilities that, as far as I know, aren't as developed in other species). "Evidence shows strong relationships between levels of violence and potentially modifiable factors such as concentrated poverty, income and gender inequality, the harmful use of alcohol, and the absence of safe, stable, and nurturing relationships between children and parents."
These situations are all extensions of ourselves, so first we have to do our best to purge ourselves of all violence, directly and indirectly.
Purging ourselves of violence indirectly starts with the
end of our supporting violence promoting entities, such as the state, and most corporations. Without our support/submission they have no power. We're the workers... Now, this will result in a radical, but positive, change in lifestyle, but you folks know all about that.
Anyways, to avoid paying taxes, which would indirectly support wars, bail-outs, and nonrenewable energy projects, you would either have to find systematic ways past it, or just quit your job, which would give you the added plus of not participating in the economy that brings about mass inequality.
To make up for the lack of money, and therefore the lack of resources, you could spend your time that you would've spent working for someone "above" you, you could use that time to garden, tap trees, dumpster dive, write, etc, giving you other means to support yourself. Then rather than exchanging your skills/fruits of labor for food, you could barter for what you needed, with like minded people. It's all about the community! In this way you would be by passing the evil corporations as well, cause you wouldn't be buying their products.
Directly, we could take small steps in our own lives to prevent violence, such as going vegan/vegetarian, finding alternative ways to vent frustration (meditation, perhaps), bicycling rather than driving, etc.
It's a long journey, and perhaps we'll never get to complete non violence, but the satisfaction that comes from working towards something good should be enough, even for individualist egoists.
Being good makes you feel good.