Compare barter and currency systems. Discover why currency dominates modern trade and explore the evolution of digital ...

There are systems all around us, if we know where to look. A family unit is one system, while the community in which we live is another. That community is part of a bigger system of a county or city.

The first step to solving an intractable social problem is to understand the system in which it sits. If you don’t, you might find yourself investing in a solution that is ineffective, takes more time ...