The Constitution means today at least what it meant when it was written. It can be and has been modified through the amendment process when it was found to be lacking. That is what the 10th Amendment is for. If you don't find it here, the question goes back to the states and the people. The authors were saying they expected the document to not satisfy every future question and when it didn't satisfy, here is the mechanism to modify the document to address the issue. Very elegant. Anything other than this is rule by whim or decree.

For all you who believe that the Constitution is a "living document" with "living rules" think about this scenario: We are in a very high stakes poker game and all the money we have in the world has been bet and we show the cards. You have three of a kind and I have a pair. However, I also have a .357 magnum Ruger loaded with Gold Dots that I have just put on the table with the hammer cocked and I state clearly to you that because we are now playing with "living rules," my pair beats your three of a kind.

Get the point? The Constitution is a document with rules that mean what they meant when it was written and a process to amend those rules should they not fit the way we now live. It is not a place for activism.