Kantian Definition
Kantian refers to the philosophical project initiated by the 18th-century German philosopher Immanuel Kant (1724–1804), who is regarded as one of the final great systematic thinkers. Kant sought to resolve persistent problems in philosophy by arguing that the structure of the mind plays a crucial role in organising knowledge, rather than merely passively receiving perceptions. He attempted to establish universal principles for ethics and epistemology, exploring how human cognition structures experience and moral action.
Epistemology and Knowledge
Kant’s epistemological work focused on categorising different forms of knowledge. He distinguished between knowledge derived from observation and experiment, and novel forms of knowledge, such as synthetic a priori knowledge (e.g., in geometry), which allows for the derivation of innovative truths independent of empirical experience. This distinction highlights Kant’s emphasis on the necessary pre-organisation of the mind to structure our understanding of the empirical world.
Ethics
In his ethical philosophy, Kant developed an approach based on universal principles, most famously encapsulated by the ‘categorical imperative’. This principle dictates that one ought to act according to rules that could be universally applied; for instance, one should never lie because a society tolerating lying would not be desirable.
Legacy and Modern Significance
Subsequent philosophers diverged from Kant’s universalist aims. For example, thinkers such as Hegel challenged the notion of absolute universal truths by linking knowledge development to the historical evolution of human culture. Despite these departures, the term ‘Kantian’ today often signifies the broader universalistic philosophical project. This is evident in contemporary thought, such as Jürgen Habermas’s critical theory, which employs a Kantian strategy based on the ideal of an ideal speech situation.

