Wuthering Heights was Emily Brontë's only novel, and it is considered the fullest expression of her highly individual poetic vision. It contains many Romantic influences: Heathcliff is a very Byronic character, though he lacks the self pity that mars many Byronic characters, and he is deeply attached to the natural world. When the novel was written, the peak of the Romantic age had passed: Emily Brontë lived a very isolated life, and was in some sense behind the times. Wuthering Heights expresses criticisms of social conventions, particularly those surrounding issues of gender: notice that the author distributes "feminine" and "masculine" characteristics without regard to sex. Brontë had difficulties living in society while remaining true to the things she considered important: the ideal of women as delicate beings who avoid physical or mental activity and pursue fashions and flirtations was repugnant to her. Class issues are also important: we are bound to respect Ellen, who is educated but of low class, more than Lockwood.