What is a good thesis statement according to the disagreement of marriage?

I have no idea. What do YOU want to say about marriage?

Have you written the outline for your paper yet? In drafting your outline, you should come up with your thesis statement.

Your thesis statement must include factual information plus your position/opinion/stance. Without your position on the topic, it isn't a true thesis statement. So think of this sentence as the angle you want to take on the topic and what you intend to prove by the end of your paper. (If your statement is simply factual, then there's nothing to prove!)

http://leo.stcloudstate.edu/acadwrite/thesistatement.html
This is one of the very best places I've seen online to help students write good thesis statements. It shows you sentences that aren't thesis statements and how to turn each one into real thesis statements.

To develop a strong thesis statement about the disagreement of marriage, you need to take a stance on the issue and provide a clear argument supporting your position. Remember, a thesis statement should encapsulate the main idea of your essay or argument and be debatable. Here are a few examples of thesis statements that address the disagreement over marriage:

1. Thesis statement in support of marriage: "Despite differing opinions, granting marriage equality to same-sex couples is a vital step towards achieving true social justice, as it promotes equal rights, fosters inclusive communities, and recognizes the fundamental principle of love and commitment."

2. Thesis statement against marriage: "While respecting individual rights is crucial, redefining the institution of marriage to include same-sex couples challenges the traditional understanding of marriage, potentially undermining societal values and religious freedoms."

Please note that these are only examples, not personal opinions. When crafting your thesis statement, ensure it reflects your own beliefs while providing a clear and arguable position. Additionally, it's important to gather evidence and support your arguments throughout the essay to strengthen your position.