Zakat is among the more serious attempts any tradition has made to institutionalize the obligation to share — not as a voluntary gesture but as a built-in circuit breaker against the concentration of wealth. The calculation is precise, the scope is broad, and the underlying logic is that wealth held above the nisab threshold carries an obligation to those who have less. Reason finds in it an honest reckoning with what property actually means in a community.
Each step builds on the last.