Good ppl know what is right and what is wrong. Other ppl will be stupid and ignorant in their behaviours but do not let that be an excuse for you to be stupid and ignorant too.
The world being a better place starts from you doing the right thing. As an individual you can affect change within your sphere of influence. You are an intelligent being so think of what you are doing and what you are saying because it does make a difference.
And a quote most apt:
“It takes less time to do a thing right than it does to explain why you did it wrong.” — Henry Wadsworth Longfellow