- Populism is a range of political stances that emphasize the idea of “the people” and often juxtapose this group with “the elite”. It is frequently associated with anti-establishment and anti-political sentiment. The term developed in the late 19th century and has been applied to various politicians, parties and movements since that time, often as a pejorative. Within political science and other social sciences, several different definitions of populism have been employed, with some scholars proposing that the term be rejected altogether.
- Spacetime (Wikipedia)
In physics, spacetime is a mathematical model that combines the three dimensions of space and one dimension of time into a single four-dimensional manifold. Spacetime diagrams can be used to visualize relativistic effects, such as why different observers perceive differently where and when events occur.