निम्नलिखित विद्वानों में से किसने अपने ऐतिहासिक विश्लेषण में उपनिवेशवाद के बारह अलग-अलग प्रकारों का वर्णन किया है?

Historically, colonialism was often defended or justified by the colonizers on the pretext of which of the following?

Historically, colonialism was primarily a form of which of the following?