I believe first-established trust was when people lived in communities or groups that were gathered way back in the stone age. People actually managed to get along then, but nowadays something went wrong. What is that? We'll see.
A really big topic today, so I'll try and keep it short. I could cover a whole bunch of things, maybe write a review about something. Who do you really believe in, rely on, confide your biggest inner secrets? Most importantly what do you get in return, if anything? Trust in a phrase made out of its capitals: The Reasonable (and) Understanding Social Therapy. Catchy phrase; And a good one, too! Trust is nothing more but a therapy, a social intercourse "sliced" in sessions which brings people together, connects them and makes a healthier community for us to live in.
In real-life terms, I never really truly deeply trusted anyone (apart from my family), because in the world we live in, let's face it, you can't always expect someone to be as you think. "Mental or moral state of honesty" as it's stated in wikipedia. How do I know that the trusted person won't turn their back on me when it's not to their interest? Interest (personal or business) is trust's worst enemy. Total controversy sometimes, if not most of the time. Keep your enemies closer than your friends, and your trusted persons in between; that's how I manage to get by. Sometimes enemies can prove to you real loyalty if it's in their interest, but never trust them! Always expect a retreat on their behalf.
In medical terms (here I go geeking again) 'bona fides' or 'good faith/trust', literally, is when you rely on your doctor's hands and expect the best out of them. A patient-doctor connection link can be the biggest one, even above your beloved ones. But sometimes that 'bond' is broken when someone expects more from you. Suppose a doctor's patient died and the doctor did all they could do keep him in life, but the family expected more. They'd definitely lose their trust to that person, but that's so wrong, since the doctor tried their best! Trust is all about taking risks and trying to help as much as humanly possible. That's why I chose medicine, to give my best self in order to help someone who will need my knowledge in treating him right.
In internet terms (my evil inetgeek side holds the pen now) trusting your personal data to a website is all about giving some priviledges to your personal life, likes and dislikes... If confidement and keeping data secret isn't trust, then I don't know how else to call it. In short - keep a small list of trusted websites, sometimes websites are text illusions, drowning you in floods of "get cash now, real quick fast" or "free stuff if you sign up now!". The thing is you have to try or try a search engine to check a website's credibility. Even then you simply cannot fully trust them. All the affiliate links I have here: payperpost, text-link-ads, google adsense (look at the bottom), bidvertiser, auctionads, reviewme etc. are some of the trusted and mostly reviewed ones, so I thought "What the heck, I'll give them a shot". I don't really understand how Agloco works yet, but I believe it should be ok, since it's recommended by a lot of people (I just hope it's not just a "spam and get paid" package).