The mobiles of American artist Alexander “Sandy” Calder (1898–1976) are delicate kinetic sculptures using cutout shapes reminiscent of natural forms (birds, fish, falling leaves).
The mobiles move in response to air currents, meaning that they are not completely under human control.
The existentialist philosopher Jean–Paul Sartre praised Calder’s mobiles, describing them as “lyrical invention.”



1. UNDERSTANDING THE PROBLEM
On sustainability
2. UNDERSTANDING HOW THE WORLD WORKS
On nature
On human nature
On the meaning of life and living
On culture
On morality
3. UNDERSTANDING HOW CHANGE WORKS
On the Next Level Society
On behavioral change
On marketing sustainability
4-A. FIXING HOW WE DESIGN THE WORLD
On naturalness
On naturalness in behaviour
On naturalness in art
Artworks of interest
On naturalness in architecture
Architecture of interest: naturalness
On livable architecture
Architecture of interest: livability
On naturalness in design
Design works of interest
4-B. FIXING OUR RELATIONSHIP WITH OURSELVES
On well-being, self care and happiness
4-C. FIXING THE RELATIONSHIP BETWEEN BUSINESS AND SOCIETY
On responsible business
On Positive Design & design ethics
On privacy
Progressieve bureaus van Nederland, 2021
OTHER NOTES AND WRITINGS
On digital design, CX/UX, and technology
On the travel & hospitality industry
Miscellaneous