Family upgringing, Education, Marriage - my thesis for A Thousand Splendid Suns?

This is the thesis I came up with. How can I incorporate my three points into the thesis.
Also I have having trouble coming up with a topic sentence for the body paragraphs.

The different paths that the lives of Laila and Mariam took proves that it is impossible to undo formative experiences and the resulting effects - positive or negative - that they are bound to have on future decision.

Three points

family upbringing

education (Mariam was denied an education, Laila was encouraged)

their marriage to Rasheed

Great questions. Well, what if I said this: "Tell me your thesis, and then I will let you explain the thesis statement by giving me three sentences." IF you wrote three different sentences to explain your thesis, it would be great to make each of those sentences one of the paragraph topic sentences.

So, each paragraph topic sentence should be a sentence to explain the thesis or show that it is true.

They are all connected to the main idea! :-)

Your thesis is good, but do you really need to force yourself to make a point about each of those things? Why not just find three great examples to show that the author is teaching this lesson? (i.e. the lesson you express about past events influencing out future.)

Just skim through the book again and notice the examples to show that this is indeed the lesson the author is teaching. For each example, write a para topic sentence, and then add to each para topic sentence so that it becomes a whole paragraph.

:-) I hope that helps you!

is it possible that the characters are foils or characters that relate different ideas about the same character

make your thesis direct, but still allow you to make a point

try expanding on your ideas are relate to the human condition, by showing how a piece of literature is a perspective on human life

hope this is what you are looking for