HE Mr. Selim Yenel, we write you this letter because we know Kivanc Ersoy personally as a pacifist and a non-violent person, thus we were astonished by the news of his arrest, as reported in http://www.nature.com/news/turkish-academics-jailed-for-making-terrorism-propaganda-1.19586 . Whilst awaiting the facts to be clarified, we would therefore urge you to take up the case of Dr. Ersoy.