Start with a hook something interesting like "many people say " like comparing apples to oranges' this never made sense to me because you can.
Then add some more meat if you will and then just talk about Comparing and how it's important it's to compare things you can optionally talk about how humans normally function best when adding things into groups.
Then talk about contrasting and how contrasting is very important in terms of historical accuracy you can use Colombus from the view of Natives and from the view of his men.
This is just a simple run down Its two points and do not forget a conclusion I wish you the best!
