Humane Society International has, through two investigations, exposed the extreme horror of fur farms and the lives of the animals who live on them. Photo by Kristo Muurimaa/Oikeutta Elaimille

A federal court judge last night threw out a challenge to San Francisco’s ban on the sale of fur, in a historic victory against this unnecessary and immensely cruel commodity.

The city’s ban, which passed in 2018, took effect earlier this year and it led the way for many wins against fur, including a similar, statewide ban in California. But soon after it ​took effect this January, the ​law was challenged by the fur industry, which claimed it was unconstitutional merely because San Francisco’s decision to ban fur sales in the city hurt its bottom line.

In April, the Humane Society of the United States intervened in the case to…