What is the use of would in the sentence below?

Would here denotes usual or expected behaviour. He tried to save the drowning baby as any decent person would. He ate the food as a starving man would.

Or Neg you might say 'might'

Yes, although would expresses stronger expectation than might. Like will and may.

yea Cen, might be

You had no advantage then and struggled like any other person would if that person were put in the same situation.

You had no advantage then and struggled like any other person will do if that person is put in the same situation.