For those who intrested in social enterperinship, I strongly recommed this Social entrepreneurship Forum, a proud partner to Start-up Day, to you.
Offical site: http://se-forum.se/
They hold SE Outreach Accelerator in Stockhom and Nairobi, Innovation Labs and other intresting events frequently. Mostly, people are free to attend, and be a member is just 100SEK.
There are lots of defintion of Social entrepreneur, and my own understanding is, they are people who want to start a business mainly aim to solving social issue instead of earning money.
Even if you are not intrested in what is social entrepreneurship, I also recommend you to learn basic Corporation Social Responsibility in order to be a good entreprener.
One more: Ashoka https://www.ashoka.org/ (the largest SE supporter/platform in the world)