I. Introduction  
II. Evolution of Cooperation  
1) Niceness  
2) Forgiveness  
3) Retaliation  
4) Certainty  

III. Decentralization and Decentralized Networks  
IV. Web 3 - Decentralized Web Platforms  
V. Threats to Long Term Cooperation  
A. Infrastructural Threats  
B. Social Threats  
VI. Reputation Systems  
A. PageRank  
B. WikiTrust  
C. EigenTrust  
D. HonestPeer  
E. BarterCast  
F. PeerTrust  
G. MeritRank  

VII. Distributed Ledger Technology  
1) Public Key Cryptography  
2) Distributed Peer to Peer Network  
3) Consensus Mechanism  
A. Bitcoin  
B. Ethereum  
C. IOTA  

VIII. Other Mechanisms  
A. Network Reciprocity  
B. Machine Learning Based Reputation Systems  
IX. Future Roadmap  
X. Conclusion