Investor Due Diligence Report
The newsletter of Professor Steve Stewart-Williams. Evolutionary psychology, sex differences, nature and nurture, science, philosophy, and more.
16K
1.1K paid
~0%
Subscriber count is a platform estimate
Pricing
$9/mo
$80/yr annual option
$7K
1.1K paid subs
$7K/mo – $7K/mo(±0%)
2.0
27.5
0.18%
(comments + likes) / subscribers
~2x per week
2.0 posts/week
Score based on available components only.
| Component | Score | Weight |
|---|---|---|
| Newsletter | Subscribers | Weekly Growth | Price | Platform |
|---|---|---|---|---|
| Humanity United Now - Ana Maria Mihalcea, MD, PhD | 71K | N/A | $5/mo | substack |
| Starts With A Bang | 61K | N/A | Free | substack |
| The Poetry of Reality with Richard Dawkins | 46K | N/A | $7/mo | substack |
| Make Me Good Soil | 38K | N/A | $10/mo | substack |
| Month | Subscribers | Est. Revenue | Change |
|---|---|---|---|
| Mar 2026 | 16K | $7,425.6 | — |
Revenue tracking starts with your first month of data. More data points will appear as snapshots accumulate.
Platform Dependency
Uses substack platform
Key Person
Single-author publication — key-person dependency
Audience Concentration
Consistent engagement across posts
Revenue Model
Active paid subscription tier
Subscriber threshold
16K subscribers — above the 2K category median for first paid tier
Has paid tier
Active paid subscription offering
Peer monetization
100% of 32 similar-size peers in Science have paid tiers
Pricing position
$9/mo vs $9.51/mo category average (280 newsletters)
| Date | Monthly | Annual |
|---|---|---|
| Mar 2026 | $9 | $80 |
Disclaimer: This report is generated automatically based on publicly available data and proprietary estimation models. Estimated subscriber counts are derived from engagement patterns and should be verified through direct disclosure. Revenue estimates are based on known pricing and estimated paid subscriber counts. This report is for informational purposes only and should not be the sole basis for investment decisions.
| Engagement Rate |
| 50/100 |
| 30% |
| Paid Subscriber Ratio | 75/100 | 25% |
| The Century of Biology | 25K | N/A | Free | substack |