Amazon announced this week that their ban on When Harry Became Sally, a book that criticizes the transgender movement from a socially conservative perspective, would be officially lifted.

When Harry Became Sally, written by the political philosopher Ryan T. Anderson, was banned from the online retail platform for four years, but is once more available for purchase. Amazon revealed in a statement that the decision four years ago was “hotly debated” but that they “erred on the side of being too restrictive last time, and decided to return the book to our store.”

“Balancing free speech and content that could be construed as hate speech is one of the most difficult adjudication decisions we make as a company. A few years ago, we removed When Harry Became Sally from our store after concluding that it violated our guideline prohibiting books that promote hate speech,” Amazon remarked. “The combination of our peer retailers continuing to sell the book and the ongoing feedback made us re-examine our decision.”

Amazon indeed noted that other retailers such as Barnes and Noble have continued selling the book for the last four years, indicating that “the ideas presented in this book, while controversial, should be available for those who want to read and understand the perspective of its author.”

Anderson said he is “grateful to all my friends and allies who pushed for this,” adding that “my book wasn’t hate speech for three years, then it was hate speech for four years, now it’s not again.”

Other large technology firms have pivoted away from censorship amid a changing political environment. Meta said last month that they would implement new policies centering on free expression, meaning the social media platforms owned by the company will create a community notes system, decrease their suppression of politicized content, and ban fewer user accounts.