Question: If we strictly apply the rule “my happiness will not result in other people’s unhappiness”, is it really possible for everybody to be happy?
Answer: This solely depends on our viewpoint, on the “operating program” we live, behave by.
As long as we instinctively remain within our inherent self-serving, egoistic, subjective viewpoint, following your principle in the title is impossible, as our egoistic nature is incapable to take the happiness of others into consideration at the expense of one’s own happiness.
Thus we continue succeeding, being happy at the expense of others.
Only when we change our viewpoint, when we exit our inherently selfish, egoistic and greedy spheres can we start perceiving reality from an unprecedented unique, selfless and objective viewpoint.
Only from that qualitatively higher viewing can we understand that true, infinite, sustainable happiness is only possible in a special, mutual environment, where each member primarily provides fulfillment, happiness to others. Then the created general atmosphere, mutual guarantee, the mutual circulation of “happy energy” can fulfill everybody equally, without any blemish.
Entering The Force-Field 