diff --git a/book/source/02-highlevel.md b/book/source/02-highlevel.md
index ee5f1a0..6f849cd 100644
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+++ b/book/source/02-highlevel.md
@@ -2,14 +2,17 @@
 
 ## Why OpenPGP?
 
-OpenPGP is an IETF-standardized set of cryptographic operations. OpenPGP defines mechanisms for authentication of cryptographic identities with a decentralized trust model.
+OpenPGP is a widely recognized IETF-standardized set of cryptographic operations. It is broadly used in securing communications, for example, in encrypted text messages and email, and enjoys a vast ecosystem of libraries, tools, and community support forums. Moreover, its robustness and versatility has made OpenPGP a security choice for other use cases in which encryption is important. These include file transfer applications, password managers, and data storage. 
 
-```{admonition} TODO
-:class: warning
+There are other compelling reasons for why you might consider using OpenPGP in your project:
 
-David points out: this section does not yet constitute a compelling endorsement.  
-(-> more/better text needed)
-```
+1. **Decentralized trust model**: OpenPGP's decentralization defines mechanisms for authentication that allow individuals and entities to create and manage their own cryptographic identities. Unlike centralized trust models, decentralized trust models empower individuals and entities to manage their own identities, fostering a community-driven web of trust instead of relying on a centralized authority, thus reducing single points of failure.  
+
+2. **End-to-end encryption**: OpenPGP provides a robust framework for implementing end-to-end encryption. Content remains confidential, verifiable, authenticated, and protected against unauthorized access, even when the communication channel itself might be otherwise compromised. Encryption is crucial in a myriad of scenarios, particularly when transmitting sensitive information such as financial data, personal identification information, or proprietary business data.
+
+3. **Anonymity and pseudonymity**: In sensitive and volatile situations where identity protection is crucial, OpenPGP can be used to provide a level of anonymity or pseudonymity that helps protect user identities. For example, OpenPGP has been used alongside other privacy tools, such as Tor and VPNs, to provide secure and anonymous communication for whistleblowers, human rights lawyers, activists in repressive regimes, and journalists, reducing their risks for retaliation and state violence.
+
+4. **Interoperability**: OpenPGP is a a well-structured and standardized protocol, widely adopted by various public and private entities but not tied to any particular vendor's technology. It supports all major operating systems, like Windows, macOS, GNU/Linux, Android, and iOS. Because of standardization, wide adoption, cross-platform compatibility, and adaptability, OpenPGP's interoperability significantly contributes to reducing development time, costs, and technical hurdles.
 
 ## A very brief history