Emil Lucka (1877-1941) was an Austrian writer, dramatist, and philosopher. He began writing while working as a bank clerk in Vienna, publishing essays of cultural criticism in a number of philosophical periodicals. With the success of his popular biographies of composers, writers, and artists he was able to fully devote his time to his writing. His philosophical theories were heavily influenced by Immanuel Kant, and later his plays dealt with Kantian maxims of ethics. He was best known for his revolutionary theories of love and sex, which were elucidated in his books The Evolution of Love (1922) and Eros (1915).