Created several example entries; edited the .template.md; added to the Contribute page

docs/mediums/sortition.md

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 # Sortition
 
-OVERVIEW
+Sortition is the random selection of people for positions of authority from a general pool. Those selected may serve individually or in juries and typically have the time and resources to become well informed on the questions they are chosen to decide.
+
+**Input:** census of community members, randomization method, appropriate training
+
+**Output:** advisory recommendation or binding decision
 
 ## History
 
-<!-- Beginning with the Greeks -->
+Sortition was a basic feature of Athenian democracy. During the medieval and early-modern period it was used for governing some Italian city-states, such as Venice and Florence.
+
+In recent political systems, it is used most commonly for the formation of citizen juries for trials. But it has had [other scattered uses](https://en.wikipedia.org/wiki/Sortition#Modern_application) in recent history, from Amish communities to national constitutional reform processes.
 
 ## Feedback loops
 
 ### Sensitivities
 
+* Encourages deliberation insulated from external pressures
+* Can enable juries to gain a level of focused expertise on the issue at hand greater than what would be possible for the population as a whole or elected representatives
+
 ### Oversights
 
+* May not be fully representative of the population
+* May enable groupthink and negative internal dynamics among selected juries, especially in the absence of a [secret ballot](secret_ballot)
+
 ## Implementations
 
 ### Communities
 
-<!-- Chinese "deliberative democracy" -->
+* Citizen juries in judicial trials
+* "[Deliberative democracy](https://scholar.google.com/scholar?q=deliberative democracy china)" processes in China
 
 ### Tools
 
-## Bibliography
+## Further resources
 
-## Further reading
+* [Sortition Foundation](https://www.sortitionfoundation.org/)
+* "[Sortition](https://en.wikipedia.org/wiki/Sortition)" on Wikipedia