1. I suggest you look up our population stats, because the U.S. Census Bureau disagrees with you. Didn't you see the graph I included? That was from USCB data. YES, the white population is now declining...but as I stated in the article, the birthrate of Black and Brown people and the influx of immigrants (legal and undocumented) more than make up for the white deficit.
2. Again, you really should look up US Census Bureau stats...because the hard data really doesn't care what you personally want to believe. I suggest you learn to allow the data to determine your belief, instead of letting your belief determine what you think the data must be.
3. I don't disagree that automation is going to change economies, but we're not going to get out of the wage labor trap until we get money out of politics.
4. Short of taking worldwide control of humanity and instituting something like China's 'one-child' policy, that's not going to happen by any deliberate act. As can be seen in all the world around us, the best form of population control is the combination of technological progress and gender equality (esp. with women being able to have professional careers of their own).
5. Again, I don't disagree...but having a great idea and putting it into action are two wholly different things.