diff --git a/Chapter_8.Rmd b/Chapter_8.Rmd
index b7f08f7..a5b4a06 100644
--- a/Chapter_8.Rmd
+++ b/Chapter_8.Rmd
@@ -137,3 +137,5 @@ for (i in seq_along(population_sizes)) {
 mtext("Number of people", side = 2, outer = TRUE, line = 0.2)
 par(old_par)
 ```
+
+If the  skill level is transmitted culturally  from these skilled individual to the next generation, we can then add different type of social transmission process to then get prediction about on the spread (and retention) of skills within the population.