ONE TAX ON LAND VALUE

I AM INTERESTED IN FURTHUR INFORMATION AND RESULTS OF THE USE OF THE
SINGLE TAX  ON LAND VALUE AS A WAY OF FINANCING GOVERNMENTS AND
ECONOMIES INSTEAD OF THE CLASSIC USE OF THE TAX ON INCOME TO FINANCE
GOVERNMENT BUDGETS.
I AM REFERRING TO THE GENERAL THEORIES OF THE WELL KNOWN AMERICAN
ECONOMIST , HENRY GEORGE.
WHY IS THERE OPPOSITON OF THE USE OF THIS THEORY ?   IT SEEMS THERE IS
ONLY GAIN IN THE PARTIAL OR FULL USE OF TAXING LAND VALUES AS OPPOSED
TO TAXING INCOME.
PLEASE PUT THIS UP TO GENERAL DISCUSSION.
THANKS