The population decreased in South Korea because they did not have immigration. The population will continue to meet the needs of the demands for labor through immigration or birth in the United States because it needs to maintain the leadership of the Global Order. The vested interests from the Capitalists, to the Technocrats to those who continue to push the boundaries and seek human progress will NEVER LET this happen. People who are part of this 4B movement are entitled to continue do to so, but when there is a demand for humans immigration will fill in the gaps and we will continue towards human progress unencumbered.