European migrant crisis
In 2015, Rowling expressed support for refugees.
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Environment
Rowling was recognised in 2007 with the Canadian Order of the Forest after demanding that her books be printed on "eco-friendly" papers.
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In 2008, Rowling blocked the Finnish publication of her latest Harry Potter novel on paper from Finland because it lacked the ecologically friendly certification she favours.
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Brexit
Rowling opposed Brexit and campaigned for the United Kingdom to remain in the European Union, in the run up to the 2016 referendum to leave the European Union, stating on her website that
"I'm the mongrel product of this European continent and I'm an internationalist. I was raised by a Francophile mother whose family was proud of their part-French heritage .... My values are not contained or proscribed by borders. The absence of a visa when I cross the channel has symbolic value to me. I might not be in my house, but I'm still in my hometown." 1
I could continue if you'd like.