It’s estimated that the Old Stone Age diet provided much more omega-3 fatty acids and much less omega-6s, compared to modern Western diets. This may have important implications for development of certain chronic diseases like cancer and heart disease.
I haven’t studied this issue in great detail but hope to do so at some point. Evelyn Tribole has strong opinions on it; I may get one of her books.
I saw an online video of William E.M.Lands, Ph.D., discussing the omega-6/omega-3 ratio. He mentioned free software available from the National Insitutes of Health that would help you monitor and adjust your ratio.
You can see the video here. Dr. Lands’ talk starts around minute 12 and lasts about 45 minutes. He says it’s just as important (if not more so) to reduce your omega-6 consumption as to increase your omega-3. And don’t overeat.