Why does Hardin think that a global food bank and open borders would be a bad idea? Hardin states that resources in each country are limited and opening borders to let in others from other countries would be detrimental, as it would diminish the already limited resources available in the host country for all including the host citizens. Immigration is futile to host countries because it allows exhaustion of resources in the host countries, which threatens posterity. She states that if a country is to allow a certain number of immigrants, it is required that it compensates for it by reducing the allocation of birthrights by the same amount for that particular year. This is in a bid to maintain the prescribed population control goals. A global food bank is affected by the rate of reproduction. This means that in the future, the population would by far strain the available resources and sharing would be suicidal. Sharing in a situation where resources are open for all leads people to reduced tendency to exercise good stewardship leading to a tragedy of the commons.