How can I get ePub to have text justify left in ADE?

I have looked all over for an answer to this, but how can I get my ePub to have text justify left instead of justify all? I want ragged edges to my paragraphs as it shows on other ePub readers. I am using CSS from InDesign and composing ePub in Sigil. Is there a code I need to place in my ePub html just for ADE so my paragraphs are left justified? Justify all just looks too boxy!

Thank you,