While I don't recommend it
Every Paragraph can have it's own style (marhins; Indents; Justification...)
D'oh! that is what a stylesheet is for.
My basic preference is just a few styles, with special cases added as needed (A Lean- Mean Stylesheet)
Body sets the overall style
.chapno < the chapter head: with top and bottom margins
.firstpara < usually no indent
.normalpara < indented