But without population growth there will be no economic growth, the economy will stall it will be an unmitigated disaster.

Every country must grow as much as it possibly can and then keep growing much more than that.

> without population growth there will be no economic growth

This is not true. Productivity is the mediator between a constant population and economic growth. (The world economy has grown much faster than its population over the last 100 years. And the U.S. still out produces the more-populous India.)