Honesty

Honesty is one of the basic things that make human society work - or not work. If a society becomes too dishonest, it stops working, and cannot be fixed. Mexico may be in that situation now.

Another case in point was the Soviet Union, that eventually self-destructed. It had everything going for it, but honesty. And the same is now true of the US, the UK, and the EU.

A closely related concept is trust.

Crypto is based on the discovery that trust, in some situations, is not necessary. It is now busy discovering how far this can be extended. In my opinion, this will require an improved ability to determine if a person is honest or not. 

This also applies to religion. The protestants protested that the church was dishonest. The worst wars in history resulted.