Why are right-wingers so anti-social?

It seems like right-wingers are disproportionately anti-social. The vast majority of people who are right-wing (including many libertarians and some conservatives) are anti-social. They tend to be less social and less likely to join groups (such as sports teams, volunteer groups, etc.)<br><br>The left, on the other hand, are very much pro-social. Socialism is literally a pro-social movement that focuses on increasing the social welfare. Liberals are more likely to join groups and be more social. Even the hard left, such as Marxists and socialists, are pro-social.<br><br>Is this because of the nature of leftism? Is it because of the right-wing ideologies? Is this a case of social proof where social leftism is proof that socialism is a good thing? Or is it because the left is more successful than the right, therefore, they have more time to be social?<br><br>If the left is more successful, this could explain the difference. However, this is not necessarily the case. Both the left and the right have had their share of successes and failures. There were times when the right was more successful, and there have also been times when the left was more successful.<br><br>What could be the cause of this difference in social behavior? Is there a connection to leftism or right-wing ideologies?