The fact of being male or female, especially when considered with reference to social and cultural differences, not differences in biology.
Can be seen as a socially constructed category that is associated with assigned roles, statuses, duties and responsibilities. Transformative approaches broaden our view to acknowledge the positive contributions by all, but also highlight the constricting consequences of certain roles and ascriptions.
When you close your eyes and think about 'war', what do you see? If you see a person, is it a man or a woman, and is she old or young? Do you see a raped man lying dead on the ground with his crying children around him? Do you see a young girl with a grimy face pointing her AK-47 at you? What about the people at the conference shaking hands as they sign a peace agreement? Do you imagine them as women or men, young or old?