The Lord of Karma makes agreements with different groups of beings. These beings are allowed on this Earth for a specific amount of time. Whatever the fine details of the things they are to learn. The amount of time they have to do said objectives are between spirit and those beings involved.
When the time is up, that civilization is removed from this Earth. This is the reason so many civilizations are found on this Earth. It has been a school for those beings to accomplish their goals. What I know about the Reptilian Race is that they needed to update their bodies and increase in number.
The Leaders during the time of the past agreed to accept the Reptilian Race on this Earth. The time for their rule has ended. The systems that were created to support their needs . Now you are seeing the results of this system for the demand for babies.
All souls come from the agreements of The Lords of Karma. To specific races on Earth. If that group is decreasing and another is growing it is due to these agreements.
All portals are under the control of spirit when other worlds are connected to Earth. Those groups are allowed on Earth with their own portals. When the time comes the portal is closed by spirit.
Here you can see where portals are located.