I’m not a great one for being in a crowd; not much of a “joiner”, full stop. And yet yesterday I happily found myself joining the 12,000-odd vegans walking through London for this year’s Animal Rights March.

I went along out of interest, as a way of getting out of my comfort zone, and ended up loving it. It felt like the right thing to do, being part of this big transient community made up of people from many walks of life but with this one thing in common: a desire to end the industrial-scale slaughter of sentient beings to satisfy the taste buds of people socialised to believe that the flesh and secretions of animals are essential to their health.

But what’s the point of a march like this? It’s not as if the government and its paymasters in the highly subsidised agriculture industry are going to say, yes, of course, it’s madness, how could we not see, let’s stop it. And it’s not as if people are going to turn vegan en masse. This is a long haul.

The point is simply to highlight the cruelty of the meat and dairy industries in public, demonstrating in our thousands that this vegan thing is not some trendy, passing bullshit peddled by an irrelevant minority of hipsters and freaks.

We march down the streets of the city centre, a colourful, noisy spectacle, from toddlers to the very old, and people on the pavements whip their phones out and film and take photos and wonder what the hell’s going on. Some mock, but not many. And some appear to be discussing what they see.

And if just one of those people is inspired to find out a little more about why a few thousand get off their backsides on a Saturday afternoon to call for an end to the barbarism of industrial farming, and perhaps even ends up living a plant-based life, I’d say that’s enough, job done.

But I suspect the seed gets planted in more than just one mind. I certainly hope so. Because this is not just about cruelty and the hope of a more compassionate world. It’s increasingly about our ravaged planet; the big business of industrial farming is making a significant contribution to global warming, and giving up meat and dairy is one of the easiest ways to help do something about that, if only it could be done on a large enough scale.

So yes, for this natural loner, helping to plant maybe one little mind seed is a good enough reason to get up and join in for a change.

If you’re not a vegan, I’d encourage you to investigate a bit. Maybe check out this article and Google out from it, exploring some of the questions it might provoke in you. The films Cowspiracy (it costs a small amount to download but is available on Netflix if you use that service) and Dominion (free to stream) are also worth a watch, as is this five-minute look at the dairy industry.

Of course, for all the pro-vegan information out there, you’ll find plenty from the other side, particularly with the well-funded meat and dairy industries feeling beleaguered with the growth of veganism and fighting for their lives. Consider it all. Absorb lots of information. And most of all, think for yourself as you assess it.

If you have pets, it’s interesting to meditate on what the difference between a dog, say, and a cow is. It’s hard to break free from the cultural programming to which each of us is subjected from birth on, but there’s a certain liberation to be had in at least trying.

And even if you end up dismissing veganism, no worries. The most important thing is that you base your decision on consideration of facts, not simply what you’ve been brought up to believe.

If you’re interested in participating in direct action, the next wave of climate-change protests in London will involve a blockade of the UK’s largest meat market; more information here.