Before looking at the chart let’s consider what could cause a decline in population and then we look at the chart for any possible corroboration.
We will start using contraceptives en masse. Doubtful, but possible.
We will stop having sex en masse. Doubtful.
Severe natural disaster. Possible.
Artificial Intelligence out of control. Possible.
Alien attack. I’ll leave that to you to decide?
Any other ideas?
Jupiter is “us”: humanity.
Any testimonies for “decline” or “reduction” or “shrinking” for us? Such as the South Node or Saturn in a prominent place?
Yes, Saturn in is house 1: “we” are shrinking. Barring opposite testimonies elsewhere in the chart, the question is answered by Saturn alone.
Alas, there are no testimonies to neutralize Saturn, while there are testimonies to justify Saturn.
Venus, L6, is angular in the descendant and applying to trine Jupiter with negative reception. So, Venus is coming to harm Jupiter. Jupiter is under Venus’ disposition. This is triple-testimony of an overwhelming negative force against Jupiter. Jupiter, by the way, is the natural ruler of sperm.
The offending planet (negative reception) has power to act and has power over Jupiter (disposition) and it will take place without any resistance (trine).
After that Mercury takes the light of Jupiter to Saturn.
What is the primary factor, or entity, which establishes population increase by its presence, or decrease by its absence?
So, since the Moon is so aptly placed it does not hurt to see how babies are doing in this chart.
The Moon squares L5, Mars, who is combust and being applied to by the Sun. The Moon as well as the 5th cusp is on Uranus. Antares is on the ascendant. The Moon is radical L8. Both are under the power of the Sun. If we wanted to find a testimony for contraception or sterilization that would do.
That along with the Jupiter-Saturn mutual reception gives me the impression that there might be a silver lining to this predicament. But I will refrain from interpreting it in any detail as the subject is too broad to consider details with any accuracy. This is speculation and study of symbology. The only things we are answering or predicting are: “yes” or “no”; and the timing.
So, there is a decrease indicated. How or to what extent we cannot tell, since L6 can encompass all kinds of “external” afflictions, including an epidemic or accidents or a natural disaster. Plus, Mercury will have an influence as well. As may the Moon and the Sun. Plus it may be a combination of factors instead of one factor alone, which history shows us is often the case in large shifts such as this.
Saturn is on the star Ras Alhague, Jupiter is on the star Algorab and the Moon and the 5th cusp are on the star Al Pherg. Look them up for ideas on the nuances this issue may take.
When the querent heard the answer she asked: when?
We really have no idea how sudden or how gradual this may happen, but we do have an indication of a significant initial trigger in Venus’ trining Jupiter; so the first significant event will take place in about two time units.
What are the possible time units?
To my mind they are years, decades and centuries.
Venus is mutable and cardinal. Two decades, with some delay from the mutable sign.
We may see the first significant hit against the population in about 20+ years. Further restriction taking place in around 40 years; shown by the Mercury ToL. (For details on timing technique read John Frawley.)
UPDATE: well, we are in the middle of a pandemic which started late 2019. This chart was cast in 2017. Do the math. Let’s see where we will end up in this decade.