All over the world, students listen and educators teach. In a largely unrestricted market of record size, individuals freely trade goods and services for other goods and services of their choice. Ownership of private property remains largely undisputed by men with guns. We live in the cooperative state known as civilization. Not every human activity is cooperative.
Wars still occur.
And the existence of laws implies that people do disagree about when cooperation is a good thing. But it's clear that voluntary interaction serves important human needs. The most successful economic systems on the planet are based on voluntary interaction. Political systems based on involuntary interaction, such of those of the Soviet Union and various Third World nations, have not been nearly so successful at meeting the needs and desires of their citizens as have systems which emphasize freedom. One clear trend in a technological society is the marginalization of scarcity.