Recap of previously mentioned alternatives and Jeff’s response to them:
1. Alternative community currencies
2. Austrian school gold standard
3. Ellen Brown public banking system
4. Tom Greco commercial exchanges
5. Michael Hudson and debt jubilee

To continue -- others not discussed yet:
6. Joseph Huber; Ben Dyson: Sovereign money and Central Bank Digital Currency
7. Paul Grignon and self-issued credit, perhaps based on time units 
8. Ray, Mosler, Kelton, MMT Modern monetary theory
9. CH Douglas and social credit; applications in Japan, Alberta, British Columbia
10. Bitcoin and crypto currency
11. Possible response of central bank: Central Bank Digital Currency (CBDC)
12. The PMC Transition plan applicability in the US and elsewhere.