We can't do anything personally to stop Putin.
He is evil, I do wish his own people would rise up against him but so many have been brainwashed by his propaganda.
However, what we can do is support Ukrainian refugees in this country, mainly women and children whose husbands and fathers may be captives of the Russians, held hostage or fighting on the front line.
They may feel more heartened knowing their wives, partners, children are safe here and being provided with shelter, warmth, food and clothing.
There are local groups helping in most areas.