First of all, you need to narrow that topic down. Here are some ideas for helping you narrow your focus to a topic that can be addressed in a paper:
So ... what aspect of this topic do you intend to write about? Write up one sentence which states what you intend to prove -- eventually, this will become your thesis statement.
Then be sure to follow the writing process completely.
Prewriting: brainstorm, research, plan, outline, thesis statement
Writing: write first draft by starting with section II of your outline; write introduction after the body of the paper is written; write the conclusion last.
Polishing: revise, concentrating first on the body of the paper, then the intro, then the concl (revision = making sure ideas are logical and sequential and support your thesis); proofread (spelling, grammar, usage, etc.)
Check in the Essay & Research Paper Level.
Racism started the same way any "-ism" (e.g., sexism) started, by distinguishing between "us" and "them."
I hope this added information helps.