The human face is a remarkable platform for conveying a variety of
information, both biological and social. Studies have indicated that
observers can infer human traits from faces. Facial structures serve as
a cue for behavioral propensities linked to testosterone, e.g.,
aggression, physical strength, and threats. Predicting potential threats
from face has critical and practical value for adaptation and survival;
however, observer’s accuracy on judging behavioral tendencies remains
questionable. The present review discusses the reliability of face
structures to predict threats. We review how faces provide a cue to
predict human tendencies, how facial-to-trait inference occurs, how
facial structures can serve as a proxy for potential threats.
Additionally, we discuss studies of how Eastern and Western culture may
be related to judgments of aggression and physical strength. Based on
our review, we propose other potential cues as proxies for threat
propensities, socio-cultural contributions to threat perceptions, along
with implications and methodologies for future research.