Naturalist Charles Darwin believed that emotions are adaptations that allow both humans and animals to survive and reproduce.

When we are angry, we are likely to confront the source of our irritation. When we experience fear, we are more likely to flee the threat. When we feel love, we might seek out a mate and reproduce.

Emotions serve an adaptive role in our lives by motivating us to act quickly and take actions that will maximize our chances of survival and success.

Our emotions have a major influence on the decisions we make, from what we decide to have for breakfest to which candidates we choose to vote in political elections.

Even in situations where we believe our decisions are guided purely by logic and rationality, emotions play a key role. 

Emotional intelligence, or our ability to understand and manage emotions, has been shown to play an important role in decision-making.

When we interact with other people, it is important to give clues to help them understand how we are feeling. These clues might involve emotional expression through body language, such as various facial expressions connected with the particular emotion we are experiencing.

it might involve directly stating how we feel. When we tell friends or family members that we are feeling happy, sad, excited, or frightened, we are giving them important information that they can then use to take action.

Just as our own emotions provide valuable information to others, the emotional expressions around us give us a wealth of social information.

Social communication is an important part of our daily lives and relationships, and being able to interpret and react to the emotions of others is essential. It allows us to respond appropriately and build deeper, more meaningful relationships with our friends, family, and loved ones.

Understanding the emotional displays of others gives us clear information about how we might need to respond in a particular situation.