7 years ago on Martin Luther King Jr's birthday, I wrote this post about the ideas in his Letter from a Birmingham Jail. Today I went back to the letter and re-read it, and a different section stood out at me, one that is really profound well beyond the context of civil rights:

"Injustice anywhere is a threat to justice everywhere. We are caught in an inescapable network of mutuality, tied in a single garment of destiny. Whatever affects one directly affects all indirectly."

Dr. King was a brilliant communicator, able to distill deep, profound ideas into memorable phrases.

Today on MLK's birthday, I'm thinking about the overall lack of progress we have made as a society on the very issues he discussed in his letter, namely the structural segregation and dehumanization of black Americans and other marginalized groups. And also about the other issues facing the planet, like the climate crisis, that represent the same sense of mutuality.

I spent time over the past few days with several entrepreneurs who are building crypto or "web 3" applications well outside of the financial space. One of the takeaways for me was of the important role that digital "bearer" assets will play in creating new experiences in web 3.

By bearer assets, I mean that you just show up with them, and they are respected sight unseen by whatever applications are expecting them. Every time I start thinking about this concept, I am reminded of the bearer bonds in the movie Die Hard:

For example: a device that has Helium data credits loaded on it can present itself anywhere on the Helium Network, and it will start working. No user account, no credit card, no contract -- just show up holding the token and it will "just work".

Or, take a subscription that is issued as an NFT on the Ethereum blockchain using the Unlock protocol. I show up with a compatible key and I can see the content. If I give (or sell) the key to you, you can see it.

Or, imagine decrypting content in a Zcash-based application using a Zcash viewing key. Anyone who has a key can see the content, whether it's a blog post, an email, or a private message.

And of course, this is how it is with Bitcoin. He/she who has the keys (and can sign the transaction) has the assets. No account required.

I think of all of this as a shift from account-based experiences (web2) to digital signature based experiences (web3).

Digital signatures create bearer digital assets. They travel around freely, are transferable, and they are not tied to traditional web2 accounts. Rather than the account (as represented by a login, or a credit card, or a contract) have permissions, digital assets (secured by digital signatures and private keys) have permissions.

I believe that this will enable vastly superior user experiences over time.

I spent the morning today at MTA headquarters, judging the "Accessibility" category of the NYC Transit Tech Lab competition, organized by the Partnership for NYC. Here is the view from the 20th floor of MTA HQ at Bowling Green:

Ostensibly, the theme of the day was accessibility in the sense of things that could improve the transit experience for people with disabilities and impairments of various kinds. This is, of course, a critical goal for every piece of public infrastructure, and is particularly important when it comes to transportation.

But what I quickly realized is that nearly every company that presented was not just increasing accessibility in that sense, but rather in a much broader sense -- making the system more sensible, legible and usable for everyone.

Specifically, there was a single theme that came through from nearly every team: taking an invisible or analog signal, and making it digital. As simple as that.

I can't link to the actual companies yet, as they haven't been announced, but the kinds of signals that were being turned digital included: electrical signals emanating from infrastructure like elevators and escalators to monitor conditions & outages; voice announcements sent over the PA system; and contextual and wayfinding information from signs and other physical objects, such as buses and trains.

In each case, there is a valuable signal -- valuable for people with disabilities yes, but really everyone -- that is not at all captured digitally. And in each case, a system that manages to capture that signal and provide it in digital form. Once it's digital, it can be used for anything: apps, alerts & notifications, analytics, compliance, etc. Once it's digital, it's accessible.

A major part of USV's Thesis 3.0 is "Broadening Access" and this can come in many forms. What I realized today is that the simple act of capturing an analog or real-world signal and making it digital is a powerful act of broadening access in and of itself.