Inequality is a state manifestly contrary to the law of nature whereby a handful of people gorges themselves with superfluities while the hungry majority goes in need of necessities.
Inequality is indeed the outcome of countless acts of injustice and violence, but it is only upon that very same edifice (i.e. Our culture) that such a decree can even be made.
Dogs react to inequality in ways similar to humans and stop cooperating when they feel they are being treated unfairly.
Inequality is grounded in the contemporary tendency in our society is to base our distribution on scarcity, which has vanished, and to compress our abundance into the overfed mouths of the middle and upper classes until they gag with superfluity.

Inequality is systematic disparities between participants in power and control over goals, resources and outcomes.
Inequality arises not from disparities of wealth, but from disparities of opportunity.
Inequality is a pattern of variation in well-being among people or groups (in income, consumption, education, malnutrition, etc.).