It appears J.K. Rowling was more than a little inspired by Tolkien's classic fantasy series the Lord Of The Rings when writing her Harry Potter series, and this cute chart aims to prove it by illustrating the similarities between the characters and plot points in both series.
Check out all 4 sections of the chart at the link below, and see for yourself how Harry Potter literally owes his life to J.R.R. Tolkien.
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There is pretty much no fantasy author that doesn't borrow from Tolkien, for better or worse.