The UN and historical seed studies estimate that we’ve lost three-quarters of global crop diversity, and in some countries up to 90% of regional varieties have vanished from cultivation. Not species, but the actual named varieties adapted to regions and families. Most of that diversity has disappeared from fields in just 100 years. But here’s the part most people miss: Every time you grow an heirloom, save seed, or share a variety with a neighbour, you help rebuild the diversity the industrial s