When I hit the Wicca concept of do no harm, I laughed my ass off. Here's why.
Take a minute to think about the harm done over the course of existence so you could wake up today.
Even in filling needs, harm gets done.
How much environmental harm do we do to drive?
The scarring of the earth to get the materials to build it.
The pollution in manufacturing the oil to have fuel to power it.
The pollution from driving it.
The scarring of the earth to provide roads for driving.
That is one common item in society currently.
Look around and think about where these things come from and find the harm we do to fulfill our wants as well and our needs and we often blur the line between the two to feel OK about it.