Do you read a blog that has the potential to change the world or at least make people think differently?

Someone posted an article on Facebook about a little girl called Martha who started her own blog about school dinners. The local council eventually banned her from taking photos of her food and then rescinded the ban after people from all over the world protested in writing.

Do you know of any blogs you think are inspiring, have the potential to change public policy or just opinion? Share them with us please.