The 4 Yugas of Hinduism and people’s nature in each yuga

For Hindus, the concept of time is cyclical. Time has been defined in four Yugas or ages – Satyug, Tretayug, Dwaparyug, and Kalyug. Each Yuga represents a distinct characteristic in the cycle, and has varying levels of virtue and morality. And the biggest shift has been in the nature of humans and actions of humanity.