Possibly someone who shares what little they have would be a 'greater' philanthropist than someone like Bill Gates, who has certainly donated many billions for important causes to help people ... yet still keeps at least 100 billion for himself. .. which must be his 'priorities circumstances and needs in life'.
What prompted all this was more the question, are humans 'naturally' or even ruthlessly selfish (planet B), or are we on the contrary more willing to help others, even strangers, and even at times against our own interests (planet A)? apparently the vast majority of people believe B, not A.
Of course, this in no way an original thought - I started reading a book questioning the scientific evidence for B (but I haven't got far so don't know how it ends yet) (!) and realised I sometimes assume B. Yet when I think of the many 1000s of interactions I've had with people, I've only been attacked a handful of times but I've been helped numerous times. Go figure.