psychologist for an NGO/UN, college major/grad school?

<p>I eventually want to become a psychologist for an NGO or the UN, and am currently working on my undergrad psych degree. </p>

<p>Do you have to have a degree in international relations to be qualified? Should I change my major to it or stay with psych and get a graduate degree in international relations? What should I do, any suggestions?</p>

<p>I am also learning French and Arabic, and will learn either another middle eastern language and spanish, OR one or two more middle eastern languages</p>