I have to write a thesis statement on a topic I am going to write on my topic is Racism this is my thesis statement. How can I improve it?

Why did racism start, as we are all the same? The first step is to identify how racism started and why people are that way.

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:

http://writing.colostate.edu/guides/processes/focus/list5.cfm

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.
http://blog.eduify.com/index.php/2009/06/21/5-tips-on-how-to-write-a-strong-thesis-statement/
and
http://leo.stcloudstate.edu/acadwrite/thesistatement.html

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.)

http://www.angelfire.com/wi/writingprocess/

http://grammar.ccc.commnet.edu/grammar/
Check in the Essay & Research Paper Level.

Racism started the same way any "-ism" (e.g., sexism) started, by distinguishing between "us" and "them."

http://www.members.cox.net/dagershaw/lol/PrejudiceUsThem.html

I hope this added information helps.

To improve your thesis statement on the topic of racism, you can make it more concise and focused. Here's a revised version:

"Understanding the origins and implications of racism is crucial to overcoming its effects and promoting equality."

In this revised thesis statement, we have clarified the purpose of your essay, which is to delve into the origins of racism, explore its impact on society, and discuss ways to address and challenge it. This statement provides a clear direction for your research and analysis.