Philosophy: Does trust prevail?

Just once, you are too casual to backup. Just once, even the tested trust fails. Just once, trust is traded for convenience. That once, you trusted too much. Minimize your losses (it is damage control time), save your bones, save your soul, and next time think before you trust.
My theory is that humans are inherently lazy. All the drinking, all the artificial highs, all the fervent shouting, mesmerize people into action; violent actions, fighting for a nation, fighting for cause. People die, ideologies fail, kings sell their empires, fighters sell their cause, and convenience prevails.
Practical people never trust completely. India is the land of opportunists, and opportunity prevails. Bombay is a city of dreams where money prevails. A moment of blind trust, and chicanery prevails.
Trust, valor, chivalry are un-cool ideas of a bygone era. In our generation, charity needs more publicity than a Hollywood movie, to prevail.